1. 13–14. Ref. 1
2. 54 Ref. 1
3. Computer studies of fast ion trajectories in crystals
4. Morgan, D. V. and van Vliet, D. 1970.Atomic Collision Phenomena in Solids, Edited by: Palmer, D. W., Thompson, M. W. and Townsend, P. D. 476North-Holland Publ. Co.