„LONG-TERM POWER PURCHASE AGREEMENT FOR PHOTOVOLTAIC ENERGY AS A SOLUTION FOR ENHANCING THE PROFITABILITY OF THE TASHMARUNISHTA PUMPED-STORAGE HYDRO POWER PLANT: UDC: [621.311.214+621.311.243](497.782)“. ETIMA, Bd. 3, Nr. 1, Oktober 2025, S. 75-86, https://doi.org/10.46763/ETIMA253175a.