1. Georgieva, P.V., Dolchinkov, R.: Fuzzy models for managing a micro grid PV system. In: 42nd International Convention on Information and Communication Technology, Electronics and Microelectronics (MIPRO), pp. 1066–1071 (2019)
2. What are the most efficient solar panels on the market? Solar panel cell efficiency explained.
https://news.energysage.com/what-are-the-most-efficient-solar-panels-on-the-market/
. Accessed 20 Apr 2020
3. https://en.wikipedia.org/wiki/Growth_of_photovoltaics
4. Marion, B., Adelstein, J.: Performance parameters for grid-connected PV systems. In: 31st IEEE Photovoltaic Specialists Conference, Lake Buena Vista, FL, United States, Institute of Electrical and Electronics Engineers Inc., Piscataway, NJ 08855-1331, USA (2005)
5. Dolchinkov, R., Georgieva, P.: Effectiveness of Solar Tracking Systems, Yearbook of Burgas Free University, vol. XXVII (2012). (in Bulgarian)