Circumstellar disks revealed by H/K flux variation gradients F. Pozo Nuñez, M. Haas, R. Chini, M. Ramolla, C. Westhues and K.-W. Hodapp A&A, 578 (2015) A98 Published online: 11 June 2015 DOI: 10.1051/0004-6361/201526107