Кравченко, Владимир Петрович, and Егор Владимирович Кравченко. “Optimization of Flat Solar Collectors Area for Hot Water Systems”. Technology audit and production reserves 1, no. 1(21) (January 29, 2015): 25–30. Accessed February 6, 2026. https://journals.uran.ua/tarp/article/view/36786.