Optical spectroscopy of microquasar candidates at low Galactic latitudes J. Martí, J. M. Paredes, J. S. Bloom, J. Casares, M. Ribó and E. E. Falco A&A, 413 1 (2004) 309-315 Published online: 17 December 2003 DOI: 10.1051/0004-6361:20031511