Kisakürek, B, Eisenhauer, A, Böhm, F, Hathorne, EC and Erez, J (2011) Controls on calcium isotope fractionation in cultured planktonic foraminifera, Globigerinoides ruber and Globigerinella siphonifera. Geochimica et Cosmochimica Acta, 75(2). 427-443. doi:10.1016/j.gca.2010.10.015