A quasi-time-dependent radiative transfer model of OH 104.9+2.4 D. Riechers, Y. Balega, T. Driebe, K.-H. Hofmann, A. B. Men'shchikov, V. I. Shenavrin and G. Weigelt A&A, 436 3 (2005) 925-931 Published online: 03 June 2005 DOI: 10.1051/0004-6361:20042135