Diffraction-limited bispectrum speckle interferometry of the Herbig Be star R Mon G. Weigelt, Y. Y. Balega, K.-H. Hofmann and T. Preibisch A&A, 392 3 (2002) 937-943 Published online: 09 September 2002 DOI: 10.1051/0004-6361:20021185