Spectroscopic and physical parameters of Galactic O-type stars - I. Effects of rotation and spectral resolving power in the spectral classification of dwarfs and giantsN. Markova, J. Puls, S. Scuderi, S. Simón-Díaz and A. HerreroA&A, 530 (2011) A11DOI: https://doi.org/10.1051/0004-6361/201015956
