PLANČAK, M.; BRAMLEY, A.; OSMAN, F. Investigation of plane-strain backward extrusion process by means of upper bound method. Journal of Production Engineering, [S. l.], v. 6, n. 5, 6, p. 87–97, 1989. DOI: 10.24867/JPE-1989-06-087. Disponível em: https://jpe.ftn.uns.ac.rs/index.php/jpe/article/view/814. Acesso em: 21 oct. 2024.