Рибалова, О. В., Варивода, Є. О., & Бєлан, С. В. (2012). Risk assessment of recreational use watercourses Kharkiv region as an important indicator of quality index of life. Eastern-European Journal of Enterprise Technologies, 3(11(51), 30–33. https://doi.org/10.15587/1729-4061.2011.1717