Patrakeyev, Igor, and Victor Ziborov. “Using Fuzzy Sets in the Estimation System of the Efficiency of Urban Environment Metabolism (on the Example of Cities of Ukraine)”. Geodesy and Cartography 45, no. 3 (October 25, 2019): 102-109. Accessed February 26, 2024. https://journals.vilniustech.lt/index.php/GAC/article/view/7699.