Usmonov, M. T. o’g’li. “Funksional Ketma-Ketliklar Va Qatorlarning Tekis Yaqinlashishi. Koshi Kriteriysi”. Science and Education, vol. 4, no. 1, Jan. 2023, pp. 57-76, https://openscience.uz/index.php/sciedu/article/view/4800.