«TECHNO-ECONOMIC EVALUATON OF RETROFITTING A 210 MW THERMAL HEAVY-OIL POWER PLANT WITH A PHOTOVOLTAIC SOLAR THERMAL ENERGY STORAGE SYSTEM USING MOLTEN SALT: A CASE STUDY OF TEC NEGOTINO». ETIMA, т. 2, вып. 1, март 2024 г., с. 45, https://js.ugd.edu.mk/index.php/etima/article/view/6463.