MRÓZ, Z.; SIELAMOWICZ, I. Deformation Zones in Granular Materials in Hoppers During Filling and Emptying Processes. Engineering Transactions, [S. l.], v. 51, n. 4, p. 461–491, 2003. DOI: 10.24423/engtrans.483.2003. Disponível em: https://et.ippt.pan.pl/index.php/et/article/view/483. Acesso em: 5 dec. 2025.