1. SCOTT, A., Why a Circuit Sever Affects TWT efficiency, IRE Transactions on Electron De-vices, Volume ED-9, No.1, January, 1962.
2. BRILLOUIN, Leon, Wave Propagat ion in Periodic Structures, Second Edition, Dover Publ., Inc. 1953.
3. WESSEL-BERG, T., AGeneral Theory of Kly strons with Arbitrary Ext ended Interaction Fields, Microwave Laboratory Report No.376, Stanford University, 1957.
4. CHODOROW, M. and WESSEL-BERG, T., A High-efficiency klystron with di stributed interaction, IRE Transactions on electron Devices, Volume ED-8, January, 1961, pp.44–55.
5. LAGERSTROM, R.P., Interaction impedance measurements by perturbation of travelling waves Electronic Research Laboratory Technical Report no.7, Stanford University, 1957.