@article{Broere:2012,
  author  = "I. Broere and E. Drgas-Burchardt",
  title   = "Unique factorization of compositive hereditary graph properties",
  journal = "Acta Mathematica Sinica, English Series",
  volume  = "Vol. 28",
  number  = "no 2",
  pages   = "267--280",
  year    = "2012",
}