BÉ, A. W. H. (1977) An ecological, zoogeographic and taxonomic review of recent planktonic foraminifera. RAMSAY, A. T. S., (ed.): Oceanic Micropaleontology, 1, p. 1-100. Academic press.
CRAIG, H. (1961) Standard for reporting concentrations of deuterium and O18 in natural waters. Sci., 13, p. 1833-1834.