author        = "Yakut, K. and  Zima, W. and  Kalomeni, B. and  van
                       Winckel, H. and  Waelkens, C. and  De Cat, P. and  Bauwens,
                       E. and  Vuckovic, M. and  Saesen, S. and  Le Guillou, L.
                       and  Parmaksizoglu, M. and  Uluç, K. and  Khamitov, I. and
                        Raskin, G. and  Aerts, C.",
      title         = "{Close binary and other variable stars in the solar-age
                       Galactic open cluster M 67}",
      year          = "2009",