INFLUENCE OF THE HRAZDAN RIVER POLLUTION ON MORPHOFUNCTIONAL FEATURES OF PELOPHYLAX RIDIBUNDUS INTESTINE. Proceedings of the YSU B: Chemical and Biological Sciences, [S. l.], v. 51, n. 3 (244), p. 166–170, 2017. DOI: 10.46991/PYSUB.2017.51.3.166. Disponível em: https://journals.ysu.am/index.php/proceedings-chem-biol/article/view/vol51_no3_2017_pp166-170. Acesso em: 21 jan. 2026.