H. E. Turdiyev, G.Xolmatova, and M.Qo’ldosheva. “STUDY OF SPACING OF PILE DRUMS WITH SUPPLY ROLLS”. Journal of Science-Innovative Research in Uzbekistan, vol. 2, no. 3, Mar. 2024, pp. 387-91, https://universalpublishings.com/index.php/jsiru/article/view/4904.