@article{Xu:2013FD,
  author = "Xu, Dawei",
  title = "{Eigenvector space of narrow-line Seyfert 1 galaxies}",
  doi = "10.22323/1.169.0011",
  journal = "PoS",
  year = 2013,
  volume = "Seyfert 2012",
  pages = "011"
}