Снігирьов, С. М., В. І. Мединець, О. Н. Абакумов, and В. З. Піцик. 2017. “Visual Monitoring of Dolphins in the Coastal Waters Near Zmiinyi Island (Black Sea) in 2010-2016”. Visnyk of V. N. Karazin Kharkiv National University. Series Еcоlogy, no. 16 (September), 91-95. https://doi.org/10.26565/1992-4259-2017-16-13.