Ilsters, Andrievs, and Imants Ziemelis. “Research On Decrease Of Outside Air Heat Pump Passive Evaporators Ice-Cover”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 5, 2015): 197–204. Accessed June 14, 2024. https://journals.ru.lv/index.php/ETR/article/view/895.