Verma, P.; Gautam, S.; Pal, S.; Kumar, P.; Chaturvedi, P.; Rawat, J.; Chaudhary, P.; Harsh, D.; Basu, P.; Bhatanagar, P. Carbon Nanotube-Based Cold Cathode for High Power MicrowaveVacuum Electronic Devices: A Potential Field Emitter. DSJ 2008, 58, 650-654.