KIS, Erika, and Gyöngyi SZÉKELY. “Survey Upon the Living Habits of Romanian But Hungarian Nationality Students Major in Biology and Physical Education”. Studia Universitatis Babeș-Bolyai Biologia, vol. 61, no. 1, June 2016, pp. 177-89, https://studia.reviste.ubbcluj.ro/index.php/subbbiologia/article/view/4460.