1. Particle Size Measurement, vol. 1. Powder Sampling and Particle Size Measurement;Allen,1997
2. The influence of spheroniser load in extrusion–spheronization;Barrau;Pharm. Tech. Int. Biophys.,1993
3. Statistics. Theory and Methods;Berry,1996
4. Chapman, S.R., 1985. Influence of Process Variables on the Production of Spherical Granules. Ph.D.-Thesis, London.
5. The influence of pellet shape and film coating on the filling of pellets into hard shell capsules;Chopra;Eur. J. Pharm. Biopharm.,2002