Brovkin, Yu. N, S. V. Plaksin, A. Yu. Podchasov, L. M. Pogorelaya, and Yu. V. Shkil. 2008. “INCREASE OF EFFICIENCY OF PHOTOELECTRIC ENERGY INSTALLATION OPERATION”. Electrical Engineering and Power Engineering, no. 2 (January). https://ee.zp.edu.ua/article/view/102895.