
maketip('artemov66','&nbsp;','Artemov Y., Knorre K., Strizhov V., and Ustinov V. (1966) <sup>40</sup>Ca/<sup>44</sup>Ca and <sup>16</sup>O/<sup>18</sup>O isotopic ratios in some calcerous rocks. <i>Geochem. Intern.</i> <b>3</b>, 1082&#8722;1086.');
maketip('backus55','&nbsp;','Backus M.M. (1955) Mass spectrometric determination o the relative isotopic  abundance of calcium and the determination of geologic age. Ph.D. thesis, Massachusetts Institute of Technology.');
maketip('backus64','&nbsp;','Backus M.M., Pinson W., Herzog l., and Hurley P. (1964) Calcium isotope ratios in the Homestead and Pasamonte meteorites and a Devonian limestone. <i>Geochim. Cosmochim. Acta</i> <b>28</b>, 735&#8722;742.');
maketip('billups02','&nbsp;','Billups K. and Schrag D.P. (2002) Paleotemperatures and ice volume of the past 27 Myr revisited with paired Mg/Ca and <sup>18</sup>O/<sup>16</sup>O measurements on benthic foraminifera. <i>Paleoceanography</i> <b>17</b>, 10.1029/2000PA000567.');
maketip('boehm00','&nbsp;','B&#246;hm F., Joachimski M.M., Dullo W.-Chr., Eisenhauer A., Lehnert H., Reitner J., and W&#246;rheide, G. (2000): Oxygen isotope fractionation in marine aragonite of coralline sponges. <i>Geochim. Cosmochim. Acta</i> <b>64</b>, 1695&#8722;1703'); 
maketip('brown96','&nbsp;','Brown S.J. and Elderfield H. (1996) Variations in Mg/Ca and Sr/Ca ratios of planktonic foraminifera caused by postdepositional dissolution: Evidence of shallow Mg-dependent dissolution. <i>Paleoceanography</i> <b>11</b>, 543&#8722;551.');
maketip('coleman71','&nbsp;','Coleman M. (1971) Potassium-Calcium Dates from Pegmatitic Micas. <i>Earth. Planet. Sci. Lett.</i> <b>12</b>, 399&#8722;405.'); 
maketip('compston69','&nbsp;','Compston W. and Oversby V. (1969) Lead Isotopic Analysis Using A Double Spike. <i>J. Geophys. Res.</i> <b>74</b>, 4338&#8722;4348.');
maketip('corless68','&nbsp;','Corless J. (1968) Observations on the isotopic geochemistry of calcium. <i>Earth. Planet. Sci. Lett.</i> <b>4</b>, 475&#8722;478.');
maketip('darling97','&nbsp;','Darling K.F., Wade C.M., Kroon D., and Leigh Brown A.J. (1997) Planktic foraminiferal  molecular evolution and their polyphyletic origins from benthic taxa. <i>Mar. Micropaleontol.</i> <b>30</b>, 251&#8722;266.');
maketip('darling99','&nbsp;','Darling K.F., Wade C.M., Kroon D., Leigh Brown A.J., and Bijma J. (1999) The diversity and distribution of modern planktic foraminiferal small subunit robosomal RNA genotypes and  their potential as tracers of present and past ocean circulations. <i>Paleoceanography</i> <b>14</b>, 3&#8722;12.');
maketip('delaney85','&nbsp;','Delaney M.L., Be A.W.H., and Boyle E.A. (1985) Li, Sr, Mg and Na in foraminiferal calcite shells from laboratory culture, sediment traps, and sediment cores. <i>Geochim. Cosmochim. Acta</i> <b>49</b>, 1327&#8722;1341.');
maketip('delarocha00','&nbsp;','De La Rocha C.L. and DePaolo D.J. (2000) Isotopic Evidence for Variations in the marine Calcium Cycle Over the Cenozoic. <i> Science</i> <b>289</b>, 1176&#8722;1178.');
maketip('devargas97','&nbsp;','de Vargas C., Zaninetti L., Hilbrecht H., and Pawlowski J. (1997) Phylogeny and Rates of Molecular Evolution of Planktonic Foraminifera: SSU rDNA Sequences Compared to the  Fossil Reocord. <i>J. Mol. Evol.</i> <b>45</b>, 285&#8722;294.'); 
maketip('devargas99','&nbsp;','de Vargas C., Norris R., Zaninetti L., Gibb S.W., and Pawlowski J. (1999) Molecular evidence of cryptic speciation in planktonic foraminifers and their relation to ocean provinces. <i>Proc. Nat. Acad Sci.</i> <b>96</b>, 2864&#8722;2868.');
maketip('devargas02','&nbsp;','de Vargas C., Bonzon M., Rees N.W., Pawlowski J., and Zaninetti L. (2002) A molecular  approach to biodiversity and biogeography in the planktonic foraminifer <i>Globigerinella siphonifera</i> (d’Orbigny). <i>Mar. Micropaleontol.</i> <b>45</b>, 101&#8722;116.'); 
maketip('elderfield96','&nbsp;','Elderfield H., Bertram C. J., and Erez J. (1996) A biomineralisation model for the incorporation of trace elements into foraminiferal calcium carbonate. <i>Earth. Planet. Sci. Lett.</i> <b>142</b>, 409&#8722;423.');
maketip('gussone03','&nbsp;','Gussone N., Eisenhauer A., Heuser A., Dietzel M., Bock B., B&#246;hm F., Spero H.J., Lea D.W., Bijma J., Zeebe R. and N&#228;gler Th.F. (2003) Model for Kinetic Effects on Calcium Isotope Fractionation (&#948;<sup>44</sup>Ca) in Inorganic Aragonite and Cultured Foraminifer (<i>Orbulina universa</i> and <i>Globigerinoides sacculifer</i>). <i>Geochim. Cosmochim. Acta.</i> <b>63</b>, 1375&#8722;1382');
maketip('herzog54','&nbsp;','Herzog L.F., Pinson W.H.Jr., Backus M.M., Strickland L., and Hurley P.M. (1954) Variations in isotopic abundances of strontium, calcium, and argon and related topics. Annual Progress Report for 1953-4, NYO 3934-II. Massachusetts Institute of Technology.');
maketip('heumann73','&nbsp;','Heumann K. and Lieser K. (1973) Untersuchung von Isotopenfeinvariationen des Calciums in der Natur an rezenten Carbonaten und Sulfaten. <i>Geochim. Cosmochim. Acta</i> <b>37</b>, 1463&#8722;1471.');
maketip('heumann77','&nbsp;','Heumann K., Schwabenbauer W., Stadler I., and Kubassek E. (1977) K/Ca-Altersbestimmungen an Kalifeldsp&#228;ten. <i>Z. Naturforsch.</i> <b>32a</b>, 1333&#8722;1334.');
maketip('heumann79','&nbsp;','Heumann K., Kubassek E., Schwabenbauer W., and Stadler I. (1979) Analytical Method for the K/Ca Age Determination of Geological Samples. <i>Fresen. Z. Anal. Chem.</i> <b>297</b>, 35&#8722;43.');
maketip('heuser02','&nbsp;','Heuser A., Eisenhauer A., Gussone N., Bock B., Hansen B.T., and N&#228;gler Th.F. (2002) Measurement of Calcium Isotopes (&#948;<sup>44</sup>Ca) Using a Multicollector TIMS Technique. <i>Int. J. Mass Spec.</i> <b>220</b>, 387&#8722;399.');
maketip('hippler02','&nbsp;','Hippler D., Gussone N., Darling K., Eisenhauer A., and N&#228;gler Th.F. (2002) &#948;<sup>44</sup>Ca in <i> N. pachy</i> (left): a new SST-proxy in polar regions. <i>Geochim. Cosmochim. Acta Spec. Suppl.</i> <b>66</b>(15A),  A331.'); 
maketip('huber97','&nbsp;','Huber B.T., Bijma J., and Darling K. (1997) Cryptic speciation in the living planktonic  foraminifer <i>Globigerinella siphonifera</i> (d\'Orbigny). <i>Paleobiology</i> <b>23</b>, 313&#8722;338.'); 
maketip('jungck84','&nbsp;','Jungck M., Shimamura T., and Lugmair G. (1984) Ca isotope variations in Allende. <i>Geochim. Cosmochim. Acta</i> <b>48</b>, 2651&#8722;2658.');
maketip('kennett83','&nbsp;','Kennett J.P. and M.S. Srinivasan (1983) <i>Neogene plankonic foraminifera</i>. Hutchinson Ross Publishing Company.'); 
maketip('kucera02','&nbsp;',' Kucera M. and Darling K. F. (2002) Cryptic species of planktonic foraminifera: their effect on paleoceanographic reconstructions. <i>Phil. Trans. R. Soc. Lond. A</i> <b>360</b>, 695&#8722;717.'); 
maketip('lea99','&nbsp;','Lea D. W., Mashiotta T. A., and Spero H. J. (1999) Controls on magnesium and strontium uptake in planktonic foraminifera determined by live culturing. <i>Geochim. Cosmochim. Acta</i> <b>63</b>, 2369&#8722;2379.');
maketip('lemarchand00','&nbsp;','Lemarchand D., Gailiardet J., Lewin &#200; and All&#232;gre C.J. (2000) The influence of rivers on marine boron isotopes and implications for reconstructing past ocean pH. <i>Nature</i> <b>408</b>, 951&#8722;954.'); 
maketip('loeblich64','&nbsp;','Loeblich A.R.J. and Tappan H. (1964) Foraminiferal classification and evolution. <i>J. Geol. Soc. India</i> <b>5</b>, 5&#8722;40.'); 
maketip('marshall82','&nbsp;','Marshall B.D. and DePaolo D.J. (1982) Precise age determinations and petrogenetic studies using the K-Ca method. <i>Geochim. Cosmochim. Acta</i> <b>46</b>, 2537&#8722;2545.');
maketip('marshall89','&nbsp;','Marshall B.D. and DePaolo D.J. (1989) Calcium isotopes in igneous rocks and the origin of granite. <i>Geochim. Cosmochim. Acta</i> <b>53</b>, 917&#8722;922.');
maketip('moore72','&nbsp;','Moore L.J. and Machlan L.A. (1972) High Accuracy Determination of Calcium in Blood Serum by Isotope Dilution Mass Spectrometry. <i>Anal. Chem.</i> <b>44</b>, 2291&#8722;2296.'); 
maketip('naegler00','&nbsp;','N&#228;gler Th.F., Eisenhauer A., M&#252;uller A., Hemleben C., and Kramers J. (2000) The &#948;<sup>44</sup>Ca-temperature calibration on fossil and cultured <i>Globigerinoides sacculifer</i>: New tool for reconstruction of past sea surface temperatures. <i>Geochem. Geophys. Geosyst.</i> <b>1</b>, 2000GC000091.');
maketip('niederer84','&nbsp;','Niederer F.R. and Papanastassiou D. A. (1984) Ca isotopes in refractory inclusions. <i>Geochim. Cosmochim. Acta</i> <b>48</b>, 1279&#8722;1293.');
maketip('oneil86','&nbsp;','O&#8216;Neil J.R. (1986) Theoretical and experimental aspects of isotopic fractionation. In <i>Reviews of Mineralogy. Stable Isotopes in High Temperature Geological Processes, 16</i> (eds. J.W. Valley, J.R. O\'Neil, and H.P. Taylor), pp. 561&#8722;570. Mineralogical Society of America.'); 
maketip('pearson95','&nbsp;','Pearson P.N. (1995) Planktonic Foraminifer Biostratigraphy and the Development of Pelagic  Caps on Guyots in the Marshall Island Group, <i>Proc. Ocean Drill. Program Sci. Results</i> <b>144</b>, 21&#8722;59.'); 
maketip('pearson97','&nbsp;','Pearson P.N., Shackleton N.J., and Hall M.A. (1997) Stable isotopic evidence for the sympatric divergence of <i>Globigerinoides trilobus</i> and <i>Orbulina universa</i> (planktonic  foraminifera). <i>J. Geol. Soc. London</i> <b>154</b>, 295&#8722;302.'); 
maketip('platzner97','&nbsp;','Platzner I.T. (1997) Modern Isotope Ratio Mass Spectrometry. John Wiley &#38; Sons.');
maketip('pflug65','&nbsp;','Pflug H. (1965) Foraminiferen und &#228;hnliche Fossilreste aus dem Kambrium und Algonkium. <i>Paleontographica A</i> <b>125</b>, 46&#8722;59.'); 
maketip('rohling98','&nbsp;','Rohling E.J. and Bigg, G.R. (1998): Paleosalinity and &#948;<sup>18</sup>O : A critical assessment. <i>J.. Geophys. Res., C</i> <b>103</b>, 1307&#8722;1318');
maketip('romanek92','&nbsp;','Romanek C.S., Grossman E.L. and Morse J.W. (1992): Carbon isotopic fractionation in synthetic aragonite and calcite: Effects of temperature and precipitation rate. <i>Geochim. Cosmochim. Acta</i> <b>56</b>, 419&#8722;430'); 
maketip('rosenthal97','&nbsp;','Rosenthal Y., Boyle E.A., and Slowey N. (1997) Temperature control on the incorporation of magnesium, strontium, fluorine and calcium into benthic foraminiferal shells from Little Bahama Bank: Prospect for thermocline paleoceanography. <i>Geochim. Cosmochim. Acta</i> <b>61</b>, 3633&#8722;3643.');
maketip('russell78','&nbsp;','Russell W.A., Papanastassiou D.A., and Tombrello T.A. (1978) Ca isotope fractionation on the Earth and other solar system materials. <i> Geochim. Cosmochim. Acta</i> <b>42</b>, 1075&#8722;1090.');
maketip('skulan97','&nbsp;','Skulan J.L., DePaolo D.J., and Owens T.L. (1997) Biological control of calcium isotopic abundances in the global calcium cycle. <i>Geochim. Cosmochim. Acta</i> <b>61</b>, 2505&#8722;2510.'); 
maketip('spero97','&nbsp;','Spero H.J., Bijma J., Lea D.W., and Bemis B. E. (1997) Reassessing foraminiferal carbon and  oxygen isotope data: Effects of sea water carbonate chemistry. <i>Nature</i> <b>390</b>, 497&#8722;500.'); 
maketip('stahl68a','&nbsp;','Stahl W. (1968) Search for natural variations in calcium isotope abundances. <i>Earth. Planet. Sci. Lett.</i> <b>5</b>, 171&#8722;174.');
maketip('stahl68b','&nbsp;','Stahl W. and Wendt L. (1968) Fractionation of calcium isotopes in carbonate precipitation. <i>Earth. Planet. Sci. Lett.</i> <b>5</b>, 184&#8722;186.');
maketip('zeebe99','&nbsp;','Zeebe R. (1999) An explanation of the effect of seawater carbonate concentration on foraminiferal oxygen isotopes. <i>Geochim. Cosmochim. Acta</i> <b>63</b>, 2001&#8722;2007.');
maketip('zhu98','&nbsp;','Zhu, P. and Macdougall J. (1998) Calcium isotopes in the marine environment and the oceanic calcium cycle, <i>Geochim. Cosmochim. Acta</i> <b>62</b>, 1691&#8722;1698.');
maketip('zhu99','&nbsp;','Zhu P. (1999) Calcium isotopes in the Marine Environment. Ph.D. Thesis, University of  California, San Diego.');