1. Eikonal Method in Magnetohydrodynamics
2. I. B. Bernstein and L. Friedland, in Basic Plasma Physics I, Handbook of Plasma Physics Vol. 1, edited by A. A. Galeev and R. N. Sudan (North-Holland, Amsterdam, 1983), p. 367.
3. Ergodic behavior of lower hybrid decay wave ray trajectories in toroidal geometry
4. Geometric Optics of Lower Hybrid Waves in Nonuniform Plasmas