Optical spectra of selected Chamaeleon I young stellar objects C. Saffe, M. Gómez, S. Randich, D. Mardones, P. Caselli, P. Persi and G. Racca A&A, 409 3 (2003) 993-1005 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20031150