Qutbaev, Aydos Bakbergen ulı. 2026. “TEGISLIKTEGI LOBAChEVSKIY GEOMETRIYASÍNÍŃ AYÍRÍM ÁPIWAYÍ QÁSIYETLERI”. ILIM Hám JÁMIYET, no. 5-1 (August): 17-18. https://journal.ndpi.uz/ss/article/view/2026-5-1-005.