R. A. Paygamov, G’. M. Ochilov, and O. M.Valiyeva. “DRINKING WATER OF THE SURROUNDING AREAS OF KOKAND CITY AND THEIR COMPARATIVE ANALYSIS”. Galaxy International Interdisciplinary Research Journal, vol. 11, no. 12, Dec. 2023, pp. 448-51, https://internationaljournals.co.in/index.php/giirj/article/view/4837.