@article{Winkler:20187m,
  author = "Winkler, Hartmut",
  title = "{Some things change, some don’t. An exploration of Seyfert galaxy luminosity changes over a generation}",
  doi = "10.22323/1.319.0011",
  journal = "PoS",
  year = 2018,
  volume = "HEASA2017",
  pages = "011"
}