The 2D continuum radiative transfer problem - Benchmark results for disk configurations I. Pascucci, S. Wolf, J. Steinacker, C. P. Dullemond, Th. Henning, G. Niccolini, P. Woitke and B. Lopez A&A, 417 3 (2004) 793-805 Published online: 26 March 2004 DOI: 10.1051/0004-6361:20040017