Skiepko, J., and Ha Ngoc Hien. “Natural Convection Between Two Nonuniformly Heated Coaxial Cylinders”. Engineering Transactions 34, no. 1-2 (June 30, 1986): 25–46. Accessed March 19, 2026. https://et.ippt.gov.pl/index.php/et/article/view/1795.