NONLINEAR WAVES IN A MAGNETIZED PLASMA WAVEGUIDE J.P. Lynov, P. Michelsen, H.L. Pécseli, J. Juul Rasmussen and H. Sugai J. Phys. Colloques, 40 C7 (1979) C7-571-C7-572 DOI: 10.1051/jphyscol:19797276