1. J. Stark, G. Wendt: Ann. Physik (Leipzig)38, 921 (1912)
2. G.K. Wehner: J. Appl. Phys.30, 1762 (1959)
3. G.K. Wehner: Phys. Rev.108, 35 (1957)
4. G. Carter, M.J. Nobes, J.L. Whitton, L. Tanovic, J.S. Williams: Proc. 7th Intern. Conf. on Atomic Collisions in Solids, 1977. Vol. 2 (Moscow State Univ., Publ. House 1981) p. 69
5. J.L. Whitton, G. Carter: Proc. Symp. on Sputtering, Vienna, ed. by P. Varga, G. Betz, and F.P. Viehbock (Inst. f. Allg. Phys. Tech. Univ., Wien 1980) p. 552