in the Universe IAU Symposium 209, 2002 M. Dopita, S. Kwok and R.S. Sutherland, eds. A multi-wavelength study of the oxygen-rich AGB star CIT 3: Bispectrum speckle interferometry and dust - shell modelling K.-H. Hofmann, T. Blocker, G. Weigelt Max{Planck{Institut fur Radioastronomie, 53121 Bonn, Germany Y. Balega Special ... The central-star diameter is 10.9 mas and the inner dust shell diameter 71.9 mas, being in line with lunar occultation observations. ...