SZCZEPIŃSKI, W. On the Movement of Granular Materials in Bins and Hoppers Part I: Two-Dimensional Problems. Engineering Transactions, [S. l.], v. 51, n. 4, p. 419–431, 2003. DOI: 10.24423/engtrans.480.2003. Disponível em: https://et3.ippt.pan.pl/index.php/et/article/view/480. Acesso em: 9 jun. 2025.