1. C. B. Wharton, inProceedings of the Fourth International Conference on Ionization Phenomena in Gases, Uppsala, 1959 (North-Holland, Amsterdam, 1960), Vol. 2, p. 737.
2. G. Landauer, inProceedings of the Fifth International Conference on Ionization Phenomena in Gases, Munich, 1961 (North-Holland, Amsterdam, 1962), Vol. 1, p. 389;
3. Generation of harmonics of the electron-gyrofrequency in a penning discharge
4. CYCLOTRON RADIATION OF AN Hg PLASMA GENERATED BY AN ELECTRON BEAM
5. OBSERVATION OF SPATIALLY GROWING WAVES AT THE CYCLOTRON HARMONICS IN AN ELECTRON‐BEAM‐GENERATED He PLASMA