Kovalchuk, I.P., Martyniuk, V.O. and Šeirienė, V. 2020. The basin-landscape approach to the protection and condition optimization of the lakes of the national parks. Visnyk of V. N. Karazin Kharkiv National University, series "Geology. Geography. Ecology". 53 (Dec. 2020), 239-254. DOI:https://doi.org/10.26565/2410-7360-2020-53-18.