Long-term X-ray variability of the microquasar system LS 5039/RX J1826.2-1450 P. Reig, M. Ribó, J. M. Paredes and J. Martí A&A, 405 1 (2003) 285-290 Published online: 16 June 2003 DOI: 10.1051/0004-6361:20030674