Berlinsky, N. A., and Y. I. Popov. “The Near Bottom Hypoxia and Hydrogen Sulphide Formation on the Black Sea Shelf”. Visnyk of V. N. Karazin Kharkiv National University Series «Еcоlogy», no. 18, June 2018, pp. 6-13, doi:10.26565/1992-4259-2018-18-01.