@article{CTGDC_1999__40_4_284_0,
     author = {Vitale, Enrico M.},
     title = {Multi-bimodels},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {284--296},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {40},
     number = {4},
     year = {1999},
     mrnumber = {1734247},
     zbl = {0947.18005},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1999__40_4_284_0/}
}