@article{Hartkopf:2618,
      author        = "Hartkopf, W. I. and  Allen, C. and  Davis, J. A. and 
                       Fekel, F. C. and  Lampens, P. and  Ling, J. F. and  Oblak,
                       E. and  Oswalt, T. D. and  Scarfe, C.",
      title         = "{Commission 26: Double and Multiple Stars}",
      year          = "2007",
}