Chervenkov, Dimitar, and Plamen Chernokozhev. “SPECTROPHOTOMETER FOR RESEARCH OF THE ATMOSPHERIC OZONE - POSITIONING OF THE EXECUTIVE OPERATING PARTS”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 3, no. 1 (March 5, 2023): 56–59. Accessed November 24, 2024. https://jsar.ftn.shu.bg/ojs-3.3.0-7/index.php/jsar/article/view/63.