@article{article, title  = {{The VLT-FLAMES Tarantula Survey: XXV. Surface nitrogen abundances of O-type giants and supergiants}},

 publisher = {{EDP Sciences }},

 url = {{https://eprints.whiterose.ac.uk/id/eprint/122214 https://doi.org/10.1051/0004-6361/201629225 }},

 year = {{2017}},

 month = {{4}},

 author = {{Grin NJ and Ramírez-Agudelo OH and de Koter A and Sana H and Puls J and Brott I and Crowther PA and Dufton PL and Evans CJ and Gräfener G and Herrero A et al}},

 doi = {{10.1051/0004-6361/201629225}},

 volume = {{600}},

 journal = {{Astronomy & Astrophysics}},

 note = {{Accessed on 2025/11/06}}}