1. W. B. Pearson, A. Handbook of Lattice Spacings and Structures of Metals and Alloys, Pergamon Press (1958).
2. B. Aronsson, T. Lundström, and S. Rundgvist, Borides, Silicides, and Phosphides, Methuen, London, Wiley and Sons, New York (1965), p. 14.
3. V. A. Épel'baum, N. G. Sevast'yanov, et al., Zh. Neorgan. Khim.,3, No. 11, 2545 (1958).
4. B. M. Vasyutinskii, G. N. Katamazov, and V. A. Finkel', Fiz. Metallov i Metallovedenie,12, No. 5, 771 (1961).
5. R. G. Ross and W. Hume-Rothery, J. Less-Common Metals,5, No. 3, 258 (1963).