Use of variable chlorophyll fluorescence in vivo to assess the functional state of phytoplankton 25.10.202029.01.2010 by Светлана Малахатко L. V. Stelmakh, E. A. Kuftarkova, A. I. Akimov, I. I. Babich, A. B. Kozhemyaka Full text in PDF(RUS)