Grzymkowski, M. and Mróz, Z. (1976) “Slip-Line Solutions of Some Axi-Symmetric Problems of Plastic Compression of Cylinders and Rings”, Engineering Transactions, 24(1), pp. 171–183. Available at: https://et3.ippt.pan.pl/index.php/et/article/view/2293 (Accessed: 10 June 2025).