1. McDonald, S., Kaufman, A.N.: Phys. Rev. Lett.42, 1189 (1979)
2. Casati, G., Chirikov, B.V., Izrailev, F.M., Ford, J.: Stochastic behavior in classical and quantum hamiltonian systems. In: Lecture Notes in Physics. Casati, G., Ford, J. (eds.), Vol. 93, p. 334. Berlin, Heidelberg, New York: Springer 1979
3. Casati, G., Mantica, G., Guarneri, I.: In: Chaotic behavior in quantum systems. Casati, G. (ed.), p. 113. New York: Plenum Press 1985
4. Izrailev, F.M.: Quasi-energy level spacing distribution for quantum systems stochastic in the classical limit. (in Russian), Inst. of Nuclear Physics, Novosibirsk, Preprint No. 84-63 (1984)
5. Izrailev, F.M.: Phys. Rev. Lett.56, 541 (1986)