The Araucaria Project: VLT-spectroscopy of blue massive stars in NGC 55N. Castro, A. Herrero, M. Garcia, C. Trundle, F. Bresolin, W. Gieren, G. Pietrzyński, R.-P. Kudritzki and R. DemarcoA&A, 485 1 (2008) 41-50DOI: https://doi.org/10.1051/0004-6361:200809399
