1. I. M. Fedorchenko and R. A. Andrievskii, Powder Metallurgy, Nd. 3, 147 (1959); Poroshkaya Metallurgiya, No. 1, 9 (1961).
2. A. N. Leonov, IAN OKhN, No. 5, 805 (1955).
3. M. Yu. Bal'shin, Powder Metal Science [in Russian] (Metallurgizdat, Moscow, 1948).
4. G. V. Samsonov and S. Ya. Plotkin, Production of Iron Powder [in Russian] (Metallurgizdat, Moscow, 1957).
5. I. M. Fedorchenko, G. G. Gnesin, and R. A. Andrievskii, Powder Metallurgy: Additional Collection of Papers from the Fourth Conference on Powder Metallurgy [in Russian] (NTO Mashprom', Yaroslavl', 1957), p. 15.