The IACOB project - II. On the scatter of O-dwarf spectral type − effective temperature calibrationsS. Simón-Díaz, A. Herrero, C. Sabín-Sanjulián, F. Najarro, M. Garcia, J. Puls, N. Castro and C. J. EvansA&A, 570 (2014) L6DOI: https://doi.org/10.1051/0004-6361/201424742
