Evolution and excitation conditions of outflows in high-mass star-forming regions Á. Sánchez-Monge, A. López-Sepulcre, R. Cesaroni, C. M. Walmsley, C. Codella, M. T. Beltrán, M. Pestalozzi and S. Molinari A&A, 557 (2013) A94 Published online: 09 September 2013 DOI: 10.1051/0004-6361/201321589