Petruk, Vasiliy     Multispectral control of water bodies for biological diversity with the index of phytoplankton [Текст] / Vasiliy Petruk, Sergyi Kvaterniuk, Volodymyr Pohrebennyk, Yana Bezusiak // New trends in the ecological and biological research : book of abstr. intern. sci. conf., 9-11 Sept. 2015, Univ. of Presov, Slovak Rep. / Univ. of Presov, Fac. of Humanities and Natural Sciences, Greek-Catholic Theol. Fac., Fac. of Orthodox Theology. — Presov, 2015. — P. 84.