Ivanova, Albena, Dragomir Plamenov, Pavlina Naskova, and Plamena Yankova. 2023. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA 7 (1), 44-51. Accessed February 23, 2024. https://doi.org/10.29114/ajtuv.vol7.iss1.282.