Loseva, Anna, and Rustam Sagitov. 2015. “New Data on Distribution of Spring and Autumn Haul-Out Sites of the Baltic Ringed Seals (<em>Pusa Hispida botnica</Em&gt;) in the Gulf of Finland”. Biological Communications, no. 1 (March), 15–40. https://biocomm.spbu.ru/article/view/881.