Mileva-Karova, Milena, Tsvetelin Petrov, Kristian Ivanov, Nayden Nikolov, and Tony Gadzhev. 2023. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA 7 (1), 52-60. Accessed April 22, 2024. https://doi.org/10.29114/ajtuv.vol7.iss1.267.