“COMPARATIVE ANALYSIS OF ENERGY EFFICIENCY AND ECONOMIC SUSTAINABILITY IN PUBLIC BUILDINGS: A CASE STUDY OF A KINDERGARTEN USING HEAT PUMPS AND PHOTOVOLTAIC SYSTEMS”. Natural Resources and Technology 19, no. 1 (May 31, 2025): 29–40. Accessed November 4, 2025. https://js.ugd.edu.mk/index.php/NRT/article/view/7093.