1. S. S. Kiparisov and G. A. Libenson, Powder Metallurgy [in Russian], Metallurgiya, Moscow (1980), p. 496.
2. Metal Powders. Determination of Bulk Density, GOST 19440-94, introduced (1997).
3. Metal Powders. Determination of Tap Density, GOST 25279-93, introduced (1997).
4. Determination of Tap Density, ISO 3953:2011, Publ. (2011).