Munira M. Azimova, and Nargiza M. Kurbanova. “Classification of a Modern Heating Boiler of the Saturn GPD 1535 Brand ”. PROBLEMS OF ENERGY AND SOURCES SAVING, no. 2 (February 21, 2026): 63–68. Accessed July 25, 2026. https://energy.tdtu.uz/index.php/journal/article/view/186.