CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double starsD. Sinachopoulos, P. Gavras, O. Dionatos, Ch. Ducourant and Th. MedupeA&A, 472 3 (2007) 1055-1057DOI: https://doi.org/10.1051/0004-6361:20066290
