The optical counterparts of accreting millisecond X-ray pulsars during quiescence P. D'Avanzo, S. Campana, J. Casares, S. Covino, G. L. Israel and L. Stella A&A, 508 1 (2009) 297-308 Published online: 08 October 2009 DOI: 10.1051/0004-6361/200810249