@article{EXMATH_1998_1998_1_a31,
     author = {Boucetta, Mohamed},
     title = {Integrales primeras sim\'etricas del flujo geod\'esico.},
     journal = {Extracta mathematicae},
     pages = {263-269},
     year = {1998},
     volume = {13},
     number = {3},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1998_1998_1_a31/}
}