%0 Journal Article %A A. A. Funtov %T About theory of extended interaction klystron and drift space in the form of medium with complex permittivity %J Izvestiya VUZ. Applied Nonlinear Dynamics %D 2021 %P 765-774 %V 29 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVP_2021_29_5_a5/ %G ru %F IVP_2021_29_5_a5