1. Magnetic field annihilation;Petschek,1964
2. Dayside magnetopause reconnection;Heyn;J. Geophys. Res.,1985
3. Nonlinear wave propagation;Jeffrey,1964
4. M.F. Heyn, H.K. Biernat, and V.S. Semenov, Spontaneous decay of a tangential discontinuity, this issue