Mustafayev Oybek Bobomuradovich, Rustam Umarhanovich Djuraev, and Abdixakimova Malika Amir qizi, “IMPROVING OF THE EFFICIENCY OF CLEANING OF THE BOTTOM OF THE BOREHOLE FROM THE CRUSHED SLURRY ON THE BASIS OF IMPROVING OF THE CONSTRUCTION OF A THREE-BALLCHISEL”, tajet, vol. 4, no. 04, pp. 79–91, Apr. 2022.