OPTIMAL SPECTRAL INDEX AND THRESHOLD APPLIED TO SENTINEL-2 DATA FOR EXTRACTING IMPERVIOUS SURFACE: VERIFICATION ACROSS LATITUDES, GROWING SEASONS, APPROACHES, AND COMPARISON TO GLOBAL DATASETS ArticleDvornikov Y., Grigorieva V., Varentsov M., Vasenev V.International Journal of Applied Earth Observation and Geoinformation. Том 123. 2023.