Лаврик, О.Д., Максютов, А.О. and Цимбалюк, В.В. 2019. Asymmetry and symmetry of valley-river of landscape and technical systems. Visnyk of V. N. Karazin Kharkiv National University, series "Geology. Geography. Ecology". 49 (Mar. 2019), 125-136. DOI:https://doi.org/10.26565/2410-7360-2018-49-10.