Vlasova, Olena. “Risk of Developing Congenital Malformations in Infants Whose Mothers Live under Unfavourable Geochemical Conditions”. Journal of Education, Health and Sport 8, no. 2 (February 18, 2018): 231–234. Accessed April 19, 2024. https://apcz.umk.pl/JEHS/article/view/5289.