1. [1] Williams, B.: Powder Metall. Review, vol. 5, 2016, no. 4, p. 47
2. [2] Silbereisen, H.: Powder Metall. Int., vol. 16, 1984, no. 2, p. 65
3. [3] Whittaker, D.: Powder Metall. Review, vol. 4, 2015, no. 2, p. 35
4. [4] Brookes, KJA.: Hardmetals and other Hard Materials. 2nd ed. East Barnet UK : Int. Carbide Data, 1992
5. [5] Schubert, WD., Lassner, E., Boehlke, W.: Cemented carbides – a success story. London : International Tungsten Industries Association, 2010