The G9.62+0.19–F hot molecular core - The infrared view on very young massive stars H. Linz, B. Stecklum, Th. Henning, P. Hofner and B. Brandl A&A, 429 3 (2005) 903-921 Published online: 05 January 2005 DOI: 10.1051/0004-6361:200400035