1. Blending of irregularly shaped particles
2. Carstensen J. T. Solid Pharmaceutics: Mechanical Properties and Rate Phenomena. Academic Press, NY 1980; 114–123
3. Carstensen J. T. Pharmaceutical Principles of Solid Dosage Forms. Technomic Press. 1992; 21–30
4. Daniel Biostatistics W. W., Wiley N. Y. 1978, Table G.