Abramovich, Sigal, Gerta Keller, Doris üben, and ZSOLT BERNER. (2003) 2003. “Characterization of Late Campanian and Maastrichtian Planktonic Foraminiferal Depth Habitats and Vital Activities Based on Stable Isotopes”. Palaeogeography, Palaeoclimatology, Palaeoecology 202 (1-2): 1-29. doi:10.1016/S0031-0182(03)00572-8.

Abramovich, Sigal, and Gerta Keller. (2002) 2002. “High Stress Late Maastrichtian Paleoenvironment: Inference from Planktonic Foraminifera in Tunisia”. Palaeogeography, Palaeoclimatology, Palaeoecology 178 (3-4): 145-64. doi:10.1016/S0031-0182(01)00394-7.

Abramovich, Sigal, and Gerta Keller. (2003) 2003. “Planktonic Foraminiferal Response to the Latest Maastrichtian Abrupt Warm Event: A Case Study from South Atlantic DSDP Site 525A”. Marine Micropaleontology 48 (3-4): 225-49. doi:10.1016/S0377-8398(03)00021-5.

Adatte, Thierry, Gerta Keller, Doris Stüben, Markus Harting, Utz Kramar, Wolfgang Stinnesbeck, Sigal Abramovich, and Chaim Benjamini. 2005. “Late Maastrichtian and K T Paleoenvironment of the Eastern Tethys (Israel): Mineralogy, Trace and Platinum Group Elements, Biostratigraphy and Faunal Turnovers”. Bulletin De La Societe Geologique De France 176: 37-55. doi:10.2113/176.1.37.

Keller, Gerta, and Sigal Abramovich. (2009) 2009. “Lilliput Effect in Late Maastrichtian Planktic Foraminifera: Response to Environmental Stress”. Palaeogeography, Palaeoclimatology, Palaeoecology 284 (1-2): 47-62. doi:10.1016/j.palaeo.2009.08.029.