@article{CMJ_1999__49_3_a10,
     author = {Blanco, Ricardo J. Alonso},
     title = {$\Cal D$-modules, contact valued calculus and {Poincar\'e-Cartan} form},
     journal = {Czechoslovak Mathematical Journal},
     pages = {585--606},
     publisher = {mathdoc},
     volume = {49},
     number = {3},
     year = {1999},
     mrnumber = {1708350},
     zbl = {1011.58011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_1999__49_3_a10/}
}