@article{CMH_1991__66_4_140253,
     author = {E. Giroux},
     title = {Convexit\'e en topologie de contact.},
     journal = {Commentarii mathematici Helvetici},
     pages = {637--677},
     publisher = {mathdoc},
     volume = {66},
     number = {4},
     year = {1991},
     zbl = {0766.53028},
     url = {http://geodesic.mathdoc.fr/item/CMH_1991__66_4_140253/}
}