@article{RCM_1968__2_181559,
     author = {G\'erard Joubert},
     title = {Estructuras foleadas},
     journal = {Revista colombiana de matematicas},
     pages = {105--116},
     publisher = {mathdoc},
     volume = {2},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/RCM_1968__2_181559/}
}