Steel, B. A.; Kucera, M.; Darling, K. F.; Wade, C. M. (2002): Biodiversity unmasked; cryptic species of Globigerinella siphonifera can be reliably discriminated in the fossil record. British Micropalaeontological Society, Leeds, United Kingdom, In: Henderson, Andrew (chairperson), Foraminifera Group; meeting abstracts; oral presentations, 66, 19-20, georefid:2003-077557