OZUNU, Alexandru. ON ANNIVERSARY: PhD Professor DUMITRU RISTOIU. Studia Universitatis Babeș-Bolyai Ambientum, [S. l.], v. 62, n. 2, p. 5–10, 2022. Disponível em: https://studia.reviste.ubbcluj.ro/index.php/subbambientum/article/view/1285. Acesso em: 5 feb. 2025.