@article{PIM_1991_N_S_49_63_a21,
     author = {Tong Van Duc},
     title = {Rel\`evements {Dans} {Le} {Fibr\'e} {Conormal} {D'Un} {Feuilletage} {D'Une} {Vari\'et\'e} {Riemannienne}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {155 },
     publisher = {mathdoc},
     volume = {_N_S_49},
     number = {63},
     year = {1991},
     url = {http://geodesic.mathdoc.fr/item/PIM_1991_N_S_49_63_a21/}
}