Speckle interferometry of nearby multiple starsI. I. Balega, Y. Y. Balega, K.-H. Hofmann, A. F. Maksimov, E. A. Pluzhnik, D. Schertl, Z. U. Shkhagosheva and G. WeigeltA&A, 385 1 (2002) 87-93DOI: https://doi.org/10.1051/0004-6361:20020005