@ARTICLE{Tarjan72depthfirst,
    author = {Robert Tarjan},
    title = {Depth first search and linear graph algorithms},
    journal = {SIAM JOURNAL ON COMPUTING},
    year = {1972},
    volume = {1},
    number = {2}
}

@MISC{Palmgren_SemHeyting,
    author = {Erik Palmgren},
    title = {Semantics of intuitionistic propositional logic},
    year = {2009},
    publisher = {Uppsala University},
    howpublished = {Notes de cours}
}

@misc{CoursLegeard,
  author = {Bruno Legeard},
  title  = {Cours sur le test de logiciels},
  year = {2011},
  publisher = {Université de Franche-Comté},
  howpublished = {Notes de cours},
  url = {http://ufrsciencestech.u-bourgogne.fr/master1/Qualite-Innovation-PI_archives/QUALITE%20INNOVATION%20M1%20STIC%20V2011/cours-BL.pdf}
}