Log-domain filtering by simulating the topology of passive prototypes. - Nikos Kontogiannopoulos; Costas Psychalinos (IEEE Trans. Circuits Syst. I Regul. Pap., 2005)

Switched-Current Filters Revisited: Square-Root Domain Sampled-Data Filters. - Nikos Kontogiannopoulos; Costas Psychalinos (IEEE Trans. Circuits Syst. II Express Briefs, 2006)

Topological emulation of continuous-time passive prototypes using wave port adaptors. - Nikos Kontogiannopoulos; Costas Laoudias; Costas Psychalinos (IET Circuits Devices Syst., 2010)