Wave and oscillatory phenomena in electron beams at microwave frequencies. (Volnovye i kolebatelʹnye iavlenii︠a︡ v ėlektronykh potokakh na sverkhvysokikh chastotakh / 
Shevchik, V. N.
Shvedov, G. N.
Soboleva, A. V.
Meltzer, B.
Oxford, 
1966.