Fayzullayev , Shoxzodbek Maqsud o‘g‘li. 2024. “IKKINCHI VA UCHINCHI TIP KLASSIK SOHALAR DEKART KO‘PAYTMALARINING BERGMAN YADROSI”. GOLDEN BRAIN 2 (1):35-41. https://researchedu.org/index.php/goldenbrain/article/view/5907.