Structure of the outer layers of cool standard starsS. Dehaes, E. Bauwens, L. Decin, K. Eriksson, G. Raskin, B. Butler, C. D. Dowell, B. Ali and J. A. D. L. BlommaertA&A, 533 (2011) A107DOI: https://doi.org/10.1051/0004-6361/200912442