Sadekov, A.Y. et al. 2006. Intraspecific variation in recent populations of Globigerinoides ruber from the eastern Indian Ocean: evidence from test morphology and geochemistry. Anuário do Instituto de Geociências. 29, 1 (Jan. 2006), 394–394. DOI:https://doi.org/10.11137/2006_1_394-394.