@article{Lykins:2186,
      author        = "Lykins, M. L. and  Ferland, G. J. and  Porter, R. L. and 
                       van Hoof, P. A. M. and  Williams, R. J. R. and  Gnat, O.",
      title         = "{Radiative cooling in collisionally ionized and
                       photoionized plasmas}",
      year          = "2013",
}