@mastersthesis{TUW-226429, author = {Serrano-Lopez, I.J.}, title = {{S}tudy of {N}on-{S}tationary {E}ffects of {S}pace {C}harge in {I}n{N} {F}ilms for {A}mplifiers and {D}elay {L}ines}, school = {{U}niversidad {P}olitecnica de {P}achua ({U}{P}{P}), {M}exico}, year = {2013} }