1. C. Torre, Berg- Hüttenmänn. Monatsh. 93, 62 (1948)
2. V.V. Skorokhod, I.F. Martynova, Powder Metall. Met. Ceram. 4, 70 (1977)
3. V.M. Segal, V.I. Reznikov, V.I. Malyshev, V.I. Solov’ev, Powder Metall. Met. Ceram. 6, 26 (1979)
4. T.J. Garino, J. Mater. Res. 17(10), 2691 (2002)
5. L.P. Lefebvre, G. Pleizier, Y. Deslandes, Powder Metall. Met. Ceram. 44(3), 259 (2001)