Vasenko, A., A. Vernichenko, D. Vernichenko-Tsvetkov, M. Lungu, A. Milanich, and A. Pristinska. 2016. “Analysis of Changeability of the Structural and Functional Phytoplankton Characteristic in the Lower and Delta of Danube River Within the Ukraine Borders”. Cherkasy University Bulletin: Biological Sciences Series 352 (19). https://bio-ejournal.cdu.edu.ua/article/view/98.