1. Panov, V.S., Chuvilin, A.M., and Fal’kovskii, V.A., Tekhnologiya i svoistva spechennykh tverdykh splavov i izdelii iz nikh (Technology and Properties of Sintered Hard Alloys and Its Products), Moscow: Mosk. Inst. Stali Splavov, 2004, pp. 7, 8, 14, 15.
2. Klyachko, L.I. and Leitman, M.S., Tungsten scrap recycling technology and Russian market, Tsvetn. Met., 2005, no. 3, pp. 101–104.
3. GOST (State Standard) 28817-90: Sintered Hardmetals. Determination of Metallic Elements by X-Ray Fluorescence, Moscow: Izd. Standartov, 1991.
4. GOST (State Standard) 25599.3-83: Sintered Hardmetals. Methods for the Determination of Titanium, Moscow: Izd. Standartov, 1984.
5. GOST (State Standard) 25599.4-83: Sintered Hardmetals. Method for the Determination of Cobalt, Moscow: Izd. Standartov, 1984.