Geoecological principles and criteria for evaluating the efficiency of regional touristic-recreational systems of the Fergana valleyYusupjon Akhmadaliev, Olimjon Abduganiev, Elyorbek Makhkamov, Khayitboy Abduvaliev and Zafar MadaminovE3S Web Conf., 633 (2025) 07004DOI: https://doi.org/10.1051/e3sconf/202563307004