1. A Universal Instability of Many-Dimensional Oscillator Systems;Chirikov;Phys. Rep.,1979
2. Regular and Irregular Motion;Berry,1978
3. The situation has recently been reviewed by A.J. Lichtenberg, in: Determination of the Transition between Adiabatic and Stochastic Motion, Proc. Intern. Workshop on Intrinsic Stochasticity in Plasmas, available from Les Editions de Physique, BP-112, 91402 Orsay Cedex, France.
4. Quasilinear Diffusion of an Axisymmetric Toroidal Plasma
5. Destruction of magnetic surfaces by magnetic field irregularities