On the variability of the visual binary WR 86 - WC7 with a β-Cephei companion S. J. Paardekooper, P. M. Veen, A. M. van Genderen and K. A. van der Hucht A&A, 384 3 (2002) 1012-1022 Published online: 15 March 2002 DOI: 10.1051/0004-6361:20020085