Mróz Z, Sielamowicz I. Deformation Zones in Granular Materials in Hoppers During Filling and Emptying Processes. Eng. Trans. [Internet]. 2003 Dec. 30 [cited 2025 Jul. 23];51(4):461–491. Available from: https://et.ippt.pan.pl/index.php/et/article/view/483