@conference{Per07b,
  title = "Quantum patterns and types for entanglement and separability",
  author = "S. Perdrix",
  year = "2007",
  booktitle = "QPL'05, Electronic Notes in Theoretical Computer Science, 170 pages 125-138.",
  journal = "QPL'05, Electronic Notes in Theoretical Computer Science, 170 pages 125-138.",
  url = "http://www.pps.jussieu.fr/~perdrix/publi/Perdrix-Publications/Per05-QType-QPL05.pdf",
}