Tigelis IG, KAKLAMANI DI, UZUNOGLU NK. Radiation of a planar spiral antenna above a double-dielectric loaded ground plane. In: AP-S International Symposium (Digest) (IEEE Antennas and Propagation Society). Vol. 1. ; 1993. pp. 152-155. Website

Vomvoridis JL, Hizanidis K, Tigelis IG, FRANTZESKAKIS DI. Electrostatic effects on the quality of gyrotron beams. In: Proceedings of SPIE - The International Society for Optical Engineering. Vol. 2104. ; 1993. pp. 460-461. Website

Tigelis IG, Vomvoridis JL. Non-linear analysis of an adiabatic magnicon. International Journal of Electronics [Internet]. 1993;75:511-533. Website