1. C. W. Olsen, J. Geophys. Res.,72, 20 (1967).
2. C. E. Chapin, Symposium on Engineering with Nuclear Explosions, Las Vegas, Nevada, January 14–16, 1970.
3. V. A. Egorov, V. M. Kolobashkin, and N. A. Kudryashov, Fiz. Goreniya Vzryva,15, No. 5 (1979).
4. Yu. A. Izrael', Peaceful Nuclear Explosions and the Environment [in Russian], Nedra, Leningrad (1974).
5. G. W. Johnson et al., Underground Nuclear Explosions [Russian translation], IL, Moscow (1962).