VLT observations of metal-rich extra galactic HIIregions - I. Massive star populations and the upper end of the IMFM. Pindao, D. Schaerer, R. M. González Delgado and G. StasińskaA&A, 394 2 (2002) 443-457DOI: https://doi.org/10.1051/0004-6361:20021178