1. Cathode ray bunching;Webster;J. Appl. Phys.,1939
2. “Tubes Electroniques à Commande par Modulation de Vitesse.”;Warnecke,1951
3. Small signal theory of velocity modulated electron beams;Hahn;Gen. Elec. Rev.,1939
4. The electronic-wave theory of velocity modulated tubes;Ramo;Proc. IRE,1939
5. Elementary treatment of longitudinal debunching in a velocity modulation system;Feenberg;J. Appl Phys.,1946