Weigelt, G., Beckert, T., Hofmann, K.-H., Schertl, D., Wittkowski, M.: Infrared Interferometry of AGN: present results and future goals. Workshop "Multiband Approach to AGN", Sep 30-Oct 2, 2004, Bonn, Germany. Memorie della Società Astronomica Italiana, 76, p. 39-42 (2005).

Weigelt, G., Beckert, T., Hofmann, K.-H., Schertl, D., Wittkowski, M.: Diffraction-limited bispectrum speckle interferometry of NGC 1068 in the H and K band. Workshop The central parsec of galaxies, Oct 6-8, 2004, Heidelberg, Germany (2004).

Weigelt, G., Beckert, T., Wittkowski, M.: NIR interferometry of the Seyfert galaxy NGC 1068: present interferometric NIR results and future goals. 37th Liège International Astrophysical Colloquium. Science Case for Next Generation Optical/Infrared Interferometric Facilities (the post VLTI era). August 23-26, 2004 in Liège, Belgium. Liege University, Institute of Astrophysics and Geophysics, Surdej, J.; Caro, D.; Detal, A. (eds.), p. 97-104.

Weigelt, G., Wittkowski, M., Balega, Y.Y., Beckert, T., Hofmann, K.-H., Menshchikov, S.: Bispectrum speckle interferometry of NGC 1068. Workshop "The structure and composition of Active Galactic Nuclei: Optical interferometry and adaptive optics of NGC 1068". Jan 12-14, 2004, Leiden, Netherlands.

Weigelt, G.: Near -IR interferometry: spectrally dispersed JHK-band IOTA / GI2T interferograms, advantages of NIR, and aims. Ringberg Workshop (2003).

Weigelt, G., Beckmann, U., Berger, J., Bloecker, T., Brewer, M.K., Hofmann, K.-H., Lacasse, M., Malanushenko, V., Millan-Gabet, R., Monnier, J., Ohnaka, K., Pedretti, E., Schertl, D., Schloerb, P., Scholz, M., Traub, W., Yudin, B.: JHK-band Spectro-Interferometry of T Cep with the IOTA Interferometer. Interferometry for Optical Astronomy II, W.A. Traub (ed.), SPIE 4838, p. 181-184 (2003).