BOZOROVA LAYLO NASILLOYEVNA. MAKTAB MATEMATIKA KURSIDA KOMBINATORIKANING ASOSIY QOIDASI MAVZUSINI O’QITISHNING O’ZIGA XOS XUSUSIYATLARI . ta’lim. 2025;43(2):181-186. Accessed July 5, 2025. https://scientific-jl.com/tal/article/view/9194