Trzepieciński, Tomasz, et al. “EXPERIMENTAL DETERMINATION OF THE DRAW BEAD COEFFICIENT OF FRICTION OF CuZn SHEETS IN SHEET METAL FORMING PROCESSES”. Acta Metallurgica Slovaca, vol. 29, no. 3, Sept. 2023, pp. 123-9, doi:10.36547/ams.29.3.1780.