Stoyanov, Stiliyan. “RESEARCH OF FACTORS WHICH INFLUENCE THE QUALITY OF OPTIC TELESCOPIC DEVICES: RESEARCH OF FACTORS WHICH INFLUENCE THE QUALITY OF OPTIC TELESCOPIC DEVICES”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 5, no. 1 (March 8, 2023): 57–63. Accessed November 24, 2024. https://jsar.ftn.shu.bg/index.php/jsar/article/view/109.