Obozov, A. Dj., and R. E. Isaev. “To One of the Tasks of Modernization of Boiler Houses Using Flat Plate Solar Collectors”. International Journal of Solar Thermal Vacuum Engineering 1, no. 1 (October 1, 2020): 39–51. Accessed May 3, 2024. https://www.akademiabaru.com/submit/index.php/stve/article/view/1096.