Long-term evolution of FU Orionis objects at infrared wavelengths P. Ábrahám, Á. Kóspál, Sz. Csizmadia, M. Kun, A. Moór and T. Prusti A&A, 428 1 (2004) 89-97 Published online: 23 November 2004 DOI: 10.1051/0004-6361:20040315