1. L. G. Voroshnin and L. S. Lyakhovich, Borided Steels [in Russian], Metallurgiya, Moscow (1978), p. 240.
2. L. G. Voroshnin, Boriding of Industrial Steels and Cast Iron [in Russian], Minsk, Belarus (1981), p. 208.
3. M. Hansen, Constitution of Binary Alloys, 2nd ed., McGraw-Hill, New-York (1958), p. 249.
4. H. Okamoto, “B-Fe (boron–iron),” J. Phase Equilib. Diffusion, 25, 297–298 (2004).
5. P. Goeuriot, R. Fillit, F. Thevenot, et al., “The influence of alloying element additions on the boriding of steels,” Mater. Sci. Eng., 55, No. 1, 9–19 (1982).