and (2013) “THEORY OF CALCULATION OF EFFORT IN FORMING BIMETALLIC HARVESTING OF SEALING PIPE FITTING GAS TRANSPORTATION SYSTEM”, Municipal economy of cities. Series: «Economy science», (86), pp. 213–219. Available at: https://khges.kname.edu.ua/index.php/khges/article/view/1693 (Accessed: 16 June 2025).