Uniaxial bi-anisotropic dielectric ring resonators analysis using the mode matching method N. Aknin, A. El Moussaoui, M. Iben Yaich and M. Essaaidi Eur. Phys. J. AP, 6 2 (1999) 189-193 Published online: 15 May 1999 DOI: 10.1051/epjap:1999170