@article{CTGDC_1992__33_3_225_0,
     author = {Ehresmann, A. C. and Vanbremeersch, J-P.},
     title = {Outils math\'ematiques pour mod\'eliser les syst\`emes complexes},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {225--236},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {33},
     number = {3},
     year = {1992},
     mrnumber = {1186947},
     zbl = {0766.92001},
     language = {fr},
     url = {http://www.numdam.org/item/CTGDC_1992__33_3_225_0/}
}