For citations:

Kutygin R.V., Kilyasov A.N. Modeling of ontogenetic changes in the shell cross section of the most ancient (Late Permian) representatives of Otoceras (Ammonoidea). Arctic and Subarctic Natural Resources. 2024;29(1):48-59. (In Russ.) https://doi.org/10.31242/2618-9712-2024-29-1-48-59