B fields in OB stars (BOB): Low-resolution FORS2 spectropolarimetry of the first sample of 50 massive stars
L. Fossati, N. Castro, M. Schöller, S. Hubrig, N. Langer, T. Morel, M. Briquet, A. Herrero, N. Przybilla, H. Sana, F. R. N. Schneider, A. de Koter and the BOB Collaboration
