@article{MOMA_1983__95_178121,
     author = {Gilbert Monna},
     title = {...-platitude des {Structures} de {Contact.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {221--228},
     publisher = {mathdoc},
     volume = {95},
     year = {1983},
     zbl = {0507.53026},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1983__95_178121/}
}