Authors: Oblak, E Lampens, P Cuypers, J Halbwachs, JL Martin, E Seggewiss, W Sinachopoulos, D van Dessel, EL Chareton, M Duval, D

Citation: E. Oblak et al., CCD photometry and astrometry for visual double and multiple stars of the HIPPARCOS catalogue I. Presentation of the large scale project, ASTRON ASTR, 346(2), 1999, pp. 523-531