1. The flow of granular solids through orifices;Beverloo;Chem. Eng. Sci.,1961
2. Evaluating the flow properties of solids;Carr;Chem. Eng.,1965
3. Cocks, A.C.F., Dihoru, L., Lawrence, T. 2001. A fundamental study of die filling, In: Proceedings of PM2001, Nice, France, Oct. 22–24, pp. 255–260.
4. An insight into the flowability and characterisation of powders;Freeman;Am. Lab.,2001
5. German, R.M., 1994. Powder Metallurgy Science, Metal Powder Industries Federation, Princeton, New Jersey.