cw and pulsed EPR study of lithium irradiated n-type 21R SiC G. Mitrikas, M. Kokkoris, S. Kossionides and G. Kordas Eur. Phys. J. AP, 21 3 (2003) 163-170 Published online: 19 December 2002 DOI: 10.1051/epjap:2002123