Cavities in inner disks: the GM Aurigae case A. Dutrey, S. Guilloteau, V. Piétu, E. Chapillon, F. Gueth, T. Henning, R. Launhardt, Y. Pavlyuchenkov, K. Schreyer and D. Semenov A&A, 490 2 (2008) L15-L18 Published online: 01 October 2008 DOI: 10.1051/0004-6361:200810732