Podobina, Vera M. “New Data on Middle and Late Albian Foraminifera and Biostratigraphy of the Northern Palaeobiogeographical District of Western Siberia”. Geologos 21, no. 1 (April 7, 2015): 71–78. Accessed April 25, 2024. https://pressto.amu.edu.pl/index.php/logos/article/view/logos-2015-0004.