Sayitjonova Mashxuraxon Tulkinovna. “USE OF HIGHER-ORDER DERIVATIVES IN DETERMINING THE OPTIMAL SHAPE OF A GRINDING HAMMER AND JAW IN TECHNOLOGICAL MACHINES”. Journal of Applied Science and Social Science, vol. 16, no. 4, Apr. 2026, pp. 902-6, https://www.internationaljournal.co.in/index.php/jasass/article/view/4123.