Anvarov , Farxod, and Sevdiyor Ahtamov. “IQTISODIYOTDA DIFFERENSIAL HISOBLASHNING QO‘LLANILISHI”. Scientific Practical Conference, vol. 1, no. 3, Apr. 2026, pp. 583-6, https://d-pressa.com/index.php/spc/article/view/513.