@article{GAMA_1963_1963_1_a3,
     author = {Bayolo Pacheco De Amorim, Jos\'e},
     title = {Sobre el concepto envolvente.},
     journal = {Gaceta matem\'atica},
     pages = {61-64},
     publisher = {mathdoc},
     volume = {15},
     number = {3-4},
     year = {1963},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1963_1963_1_a3/}
}