1. G. Casati, B.V. Chirikov, J. Ford and F.M. Izraelev, in Stochastic behavior in classical and quantum systems (eds: G. Casati and J. Ford), Springer Lecture notes in Physics 93, 334 (1979).
2. M.V Berry, in Lcs Houches Lecture Series 36 (eds: HG. Iooss,R.H.G Helleman and R. Stora) (North- Holland, Amsterdam 1983 ) 171.
3. M.V. Berry, Phil. Trans. Roy. Soc. Lond. A287, 237 (1977).
4. HJ. Korsch and M.V. Berry, Physica 3D, 627 (1981).
5. B.V. Chirikov, F.M. Izraelev, and D.L. Shepelyansky, Sov. Sci.Rev. C2, 209 (1981).