@inproceedings{BroekGN08,
  title = {Elimination of Constraints from Feature Trees},
  author = {Pim van den Broek and Ismênia Galvão and Joost Noppen},
  year = {2008},
  tags = {constraints},
  researchr = {https://researchr.org/publication/BroekGN08},
  cites = {0},
  citedby = {0},
  pages = {227-232},
  booktitle = {SPLC},
}

@inproceedings{BroekG09,
  title = {Analysis of Feature Models using Generalised Feature Trees},
  author = {Pim van den Broek and Ismênia Galvão},
  year = {2009},
  url = {http://www.vamos-workshop.net/proceedings/VaMoS_2009_Proceedings.pdf},
  tags = {analysis},
  researchr = {https://researchr.org/publication/BroekG09},
  cites = {0},
  citedby = {0},
  pages = {29-35},
  booktitle = {vamos},
}