A 33 hour period for the Wolf-Rayet/black hole X-ray binary candidate NGC 300 X-1S. Carpano, A. M. T. Pollock, A. Prestwich, P. Crowther, J. Wilms, L. Yungelson and M. EhleA&A, 466 2 (2007) L17-L20DOI: https://doi.org/10.1051/0004-6361:20077363
