The VLT-FLAMES Tarantula Survey. XXV. Surface nitrogen abundances of O-type giants and supergiants.
Journal article published in 2016 by
N. J. Grin,
O. H. Ramirez-Agudelo,
A. de Koter,
H. Sana 
,
J. Puls,
I. Brott,
P. A. Crowther,
P. L. Dufton,
C. J. Evans,
G. Graefener,
A. Herrero,
N. Langer,
D. J. Lennon,
J. T. van Loon,
N. Markova
and other authors.
,
J. Puls,
I. Brott,
P. A. Crowther,
P. L. Dufton,
C. J. Evans,
G. Graefener,
A. Herrero,
N. Langer,
D. J. Lennon,
J. T. van Loon,
N. Markova
and other authors.
