Photoconductivity detected magnetic resonance (PDMR) in crystalline tetracene T. Barhoumi, S. Romdhane, A. Ben Fredj, F. Henia and H. Bouchriha Eur. Phys. J. B, 34 2 (2003) 143-153 Published online: 04 August 2003 DOI: 10.1140/epjb/e2003-00206-4