Xalmatov Alisher Ilhomjonovich, Baratov Xatamjon Mahmudjon o'g'li, and Nabiyev Shukurjon Mirmuxsin o'g'li. “QATTIQ JISM MASALALARIDA KRONING - PENNI MODELI”. Journal of New Century Innovations, vol. 31, no. 3, June 2023, pp. 35-37, https://newjournal.org/new/article/view/7955.