Cingoski, V., Petrevska, B., & Gelev, S. (2018). NEW GENERATION OF PV CELLS AND THEIR POTENTIAL APPLICATION IN TOURISM AND HOTEL INDUSTRY. Challenges of Tourism and Business Logistics in the 21st Century, 1(1), 100-110. https://js.ugd.edu.mk/index.php/YFNTS/article/view/2190