<3D> NLTE line formation in the atmospheres of red supergiants M. Bergemann, R. P. Kudritzki, B. Davies, B. Plez, Z. Gazak and A. Chiavassa EAS Publications Series, 60 (2013) 103-109 Published online: 23 May 2013 DOI: 10.1051/eas/1360011