Лавринюк, З. В., and О. А. Караїм. 1. “ECOLOGICAL AUDIT AND WAYS OF IMPROVEMENT OF WATER QUALITY OF HYDROLOGICAL MONUMENTS OF NATURE «OKONSKI DZHERELA»”. Man and Environment. Issues of Neoecology, no. 3-4(24) (1), 49-54. https://periodicals.karazin.ua/humanenviron/article/view/5554.