Current hydrobiological and radioecological state of the Chernobyl NPP cooling pond - D. I. Gudkov; A. A. Protasov; V. I. Shcherbak; T. N. Djachenko; A. E. Kagljan; A. A. Silaeva; O. V. Pashkova (Reports of the National Academy of Sciences of Ukraine, 2015)