1. On the possibility of amplification in potential-depressed electron beams;Beam;Proc. Inst. Radio Engrs.,1955
2. Rippled-wall and rippled-stream amplifiers;Birdsall;Proc. Inst. Radio Engrs.,1954
3. Equivalence of Llewellyn and space-charge wave equations;Birdsall;Trans. I.R.E. PGED,1956
4. Waves in an electron stream with general admittance walls;Birdsall;J. Appl. Phys.,1953
5. The resistive wall amplifier;Birdsall;Proc. Inst. Radio Engrs.,1953