Calcium II infrared triplet line models in classical T Tauri stars R. Azevedo, N. Calvet, L. Hartmann, D. F. M. Folha, F. Gameiro and J. Muzerolle A&A, 456 1 (2006) 225-234 Published online: 23 August 2006 DOI: 10.1051/0004-6361:20054315