@article{CTGDC_1984__25_1_41_0,
     author = {Betti, Renato},
     title = {Shape theory in a bicategory},
     journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
     pages = {41--49},
     publisher = {Dunod \'editeur, publi\'e avec le concours du CNRS},
     volume = {25},
     number = {1},
     year = {1984},
     mrnumber = {764970},
     zbl = {0541.18005},
     language = {en},
     url = {http://www.numdam.org/item/CTGDC_1984__25_1_41_0/}
}