Gugov, Dimitar, Marin Todorov, Maik Streblau, and Tatyana Dimova. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA 6, no. 1 (July 30, 2022): 28-33. Accessed August 20, 2025. http://194.141.24.9/index.php/ajtuv/article/view/263.