Polarimetric and spectroscopic optical observations of the ultra-compact X-ray binary 4U 0614+091M. C. Baglio, D. Mainetti, P. D’Avanzo, S. Campana, S. Covino, D. M. Russell and T. ShahbazA&A, 572 (2014) A99DOI: https://doi.org/10.1051/0004-6361/201424665
