@article{Makope:2020hF,
  author = "Makope, Daymore Tapiwa Munyaradzi  and  Winkler, Hartmut  and  van Wyk, Francois",
  title = "{The optical and X-ray properties of a sample of Seyfert galaxies that have undergone significant spectral change}",
  doi = "10.22323/1.371.0030",
  journal = "PoS",
  year = 2020,
  volume = "HEASA2019",
  pages = "030"
}