SAYENKO, Tatiana, Oksana NAGORNIUK, i Lilija NEDOBIJCHUK. 2013. „Pedagogical Problems of Ecologocal (environmental) training in Technical Universities”. Journal of Education, Technology and Computer Science, ISSN 2719-6550, e-ISSN 2719-7417 7 (1):284-88. https://journals.ur.edu.pl/jetacomps/article/view/6846.