Professor Vira V. Protopopova (on the 85th anniversary) - M. V. Shevera; I. A. Tymchenko; L. V. Zavialova; T. V. Vasylieva; Ye. Y. Andryk; E. I. Kohut; Z. Tselka; M. Zaliberova; Ya. Maiekova (Ukrainian Botanical Journal, 2018)