Luniachek, V. E., O. I. Sinna, K. B. Borysenko, and V. S. Popov. “Optimization of the Method of Hydrological and Geomorphological Research As an Instrument in the Formation of a Modern geographer`s Special Competences”. Problems of Continuous Geographic Education and Cartography, no. 29, July 2019, pp. 6-16, doi:10.26565/2075-1893-2019-29-01.