The Wolf-Rayet features and mass–metallicity relation of long-duration gamma-ray burst host galaxiesX. H. Han, F. Hammer, Y. C. Liang, H. Flores, M. Rodrigues, J. L. Hou and J. Y. WeiA&A, 514 (2010) A24DOI: https://doi.org/10.1051/0004-6361/200912475
