1. Tantalum-Niobium International Study Center (TIC) Bull., No. 104 (1998)
2. S. Hayashida, I. Kirino, Ind. Rare Met. 115, 31 (1999)
3. A.D. Hartman, S.J. Gerdemann, J.S. Hansen, JOM, 50, 16 (1998)
4. A. Hunter, J. Met. 5, 130–132 (1953)
5. S. Naboychenko, N.V. Yefimov, Handbook of Non-Ferrous Metal Powders: Technologies and Applications, 2nd edn., ed. by O.D. Neikov (Elsevier, Amsterdam, 2019), p. 742