The VLT-FLAMES survey of massive stars: evolution of surface N abundances and effective temperature scales in the Galaxy and Magellanic CloudsC. Trundle, P. L. Dufton, I. Hunter, C. J. Evans, D. J. Lennon, S. J. Smartt and R. S. I. RyansA&A, 471 2 (2007) 625-643DOI: https://doi.org/10.1051/0004-6361:20077838
