Global collapse of molecular clouds as a formation mechanism for the most massive stars N. Peretto, G. A. Fuller, A. Duarte-Cabral, A. Avison, P. Hennebelle, J. E. Pineda, Ph. André, S. Bontemps, F. Motte, N. Schneider and S. Molinari A&A, 555 (2013) A112 Published online: 10 July 2013 DOI: 10.1051/0004-6361/201321318