Conical refraction in generalized biaxial media: A geometric algebra approach. - Sérgio A. Matos; Carlos R. Paiva; Afonso M. Barbosa (EUROCON, 2011)

Dispersion diagrams of waveguides involving indefinite media. - Antonio L. Topa; Carlos R. Paiva; Afonso M. Barbosa (EUROCON, 2011)