Shcherban, M., ZalyubovskаO., M. Lytviynenko, O. Yavorska, O. Litvinova, G. Fomina, and M. Shegedyn. “Relevance of the Laboratory Diagnosis of Chemical Levels, Microbial and Parasitic Contamination of Water Reservoirs and Recreational Beach Material”. Experimental and Clinical Medicine, Vol. 73, no. 4, Aug. 2020, pp. 161-4, https://ecm.knmu.edu.ua/article/view/622.