Universal eight-port RC network. - Kamil Vrba; Josef Cajka; Ivo Lattenberg (ICECS, 1999)

New procedure of active filter and structure design. - Josef Cajka; Kamil Vrba; Dalibor Biolek (SIP, 2001)

Novel immitance inverters. - Josef Cajka; Michal Olsak; Kamil Vrba; Ivo Lattenberg; Ivan Koudar (APCCAS (1), 2002)

General view on current conveyors. - Josef Cajka; Tomás Dostál; Kamil Vrba (Int. J. Circuit Theory Appl., 2004)