Ostapenko, O. P., and I. S. Kolos. “Energy and Ecological Efficiency of Heat Pump Installations at the Enterprises of Food Industry”. Visnyk of Vinnytsia Politechnical Institute, no. 3 (November 12, 2010): 67–71. Accessed July 16, 2024. https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/1685.