1. Yu. M. Lakhtin , Fundamentals of Physical Metallurgy (
Metallurgia,
Moscow, 1988), p. 320 (in Russian).
2. V. F. Labunets , Wear-Resistant Boride Coatings (
Tekhnika,
Kiev, 1989), p. 158.
3. M. L. Bernstein , Physical Metallurgy and Heat Treatment of Steels, Rev. ed. (
Metallurgia,
Moscow, 1991), p. 472.
4. L. G. Voroshnin , Boriding of Industrial Steels and Cast Irons (
Minsk,
Belarus, 1981), p. 205.
5. Boron cathodic arc as an ion source for shallow junction ion implantation of boron