@article{CM_1988__66_1_23_0,
     author = {Legrand, A.},
     title = {Caract\'erisation des op\'erations d'alg\`ebres sur les modules diff\'erentiels},
     journal = {Compositio Mathematica},
     pages = {23--36},
     publisher = {Kluwer Academic Publishers},
     volume = {66},
     number = {1},
     year = {1988},
     mrnumber = {937986},
     zbl = {0652.55012},
     language = {fr},
     url = {http://www.numdam.org/item/CM_1988__66_1_23_0/}
}