Mid-infrared interferometry of the massive young stellar object NGC 2264 IRS 1 R. Grellmann, T. Ratzka, S. Kraus, H. Linz, T. Preibisch and G. Weigelt A&A, 532 (2011) A109 Published online: 03 August 2011 DOI: 10.1051/0004-6361/201116699