The stellar atmosphere simulation code Bifrost - Code description and validation B. V. Gudiksen, M. Carlsson, V. H. Hansteen, W. Hayek, J. Leenaarts and J. Martínez-Sykora A&A, 531 (2011) A154 Published online: 05 July 2011 DOI: 10.1051/0004-6361/201116520