@article{IM_1977__40_142471,
     author = {J. Vey},
     title = {Sur le lemme de {Morse.}},
     journal = {Inventiones mathematicae},
     pages = {1--10},
     publisher = {mathdoc},
     volume = {40},
     year = {1977},
     url = {http://geodesic.mathdoc.fr/item/IM_1977__40_142471/}
}