Fayzullayev SU o‘g‘li. LOBACHEVSKIY AKSIOMASI VA UNDAN KELIB CHIQADIGAN NATIJALAR. ERUS [Internet]. 2023 Dec. 29 [cited 2024 Nov. 24];2(18 SPECIAL):144-7. Available from: http://erus.uz/index.php/er/article/view/5384