@article{Drgas-Burchardt:2009,
  author  = "E. Drgas-Burchardt",
  title   = "On uniqueness of a general factorization of graph properties",
  journal = "Journal of Graph Theory",
  volume  = "Vol. 62",
  number  = "no 1",
  pages   = "48--64",
  year    = "2009",
}