Третьяков, О.В., Шевченко, Т.О. and Безсонний, В.Л. 2015. Improving the environmental safety of drinking water supply in kharkiv region (Ukraine). Eastern-European Journal of Enterprise Technologies. 5, 10(77) (Oct. 2015), 40–49. DOI:https://doi.org/10.15587/1729-4061.2015.51398.