Krivileva, Svetlana, and Anastasiya Ginkul. “NANOCRYSTAL CALCIUM PHOSPHATIC MATERIALS INTENDED FOR USE IN THE QUALITY OF FILTERS FOR PROTECTION FROM ULTRAVIOLET RADIATION”. Municipal economy of cities, no. 142 (July 27, 2018): 266–271. Accessed April 29, 2024. https://khg.kname.edu.ua/index.php/khg/article/view/5217.