Collect. Czech. Chem. Commun.
1976, 41, 1759-1764
https://doi.org/10.1135/cccc19761759
The real behaviour of cohesionless granular materials undergoing deformation. The distribution of the deformation in a flowing granular material in an equipment satisfying Prandtl's boundary conditions
V. Šmíd and J. Novosad