1. Essai de théorie du tube électronique à propagation d'onde;Bernier;Ann. Radioelec.,1947
2. The O-type carcinotron;Goldberger;Proc. IRE,1956
3. Backward-wave oscillator efficiency;Grow;Proc. IRE,1955
4. Harman, W. A., “Backward-Wave Interaction in Helix Type Tubes.” Stanford Univ. Electron. Lab. Tech. Rept. No. 13 (April 1954).
5. Analysis of the backward-wave traveling-wave tube;Heffner;Proc. IRE,1954