Loseva, Anna, Sergey Kouzov, and Rustam Sagitov. 2014. “The Discovery of the Baltic Ringed Seal (<em>Pusa Hispida botnica< Em>) Breeding Lair in Kurgalskii Reserve”. Biological Communications, no. 4 (November):4–9. https://biocomm.spbu.ru/article/view/1057.