@article{Hajduk:2146,
      author        = "Hajduk, M. and van Hoof, P. A. M. and Gesicki, K. and
                       Zijlstra, A. A. and Górny, S. K. and Gladkowski, M.",
      title         = "{The evolving spectrum of the planetary nebula Hen 2-260}",
      year          = "2014",
}