@article{RCM_1969__3_181571,
     author = {Y. Takeuchi},
     title = {Estabilidad de la funci\'on ...},
     journal = {Revista colombiana de matematicas},
     pages = {25--42},
     publisher = {mathdoc},
     volume = {3},
     year = {1969},
     url = {http://geodesic.mathdoc.fr/item/RCM_1969__3_181571/}
}