@article{RRACEFN_1981_1981_1_a7,
     author = {Gir\'aldez Tiebo, Germ\'an},
     title = {Una nota sobre clases maximales para el teorema de aplicaci\'on abierta.},
     journal = {Revista de la Real Academia de Ciencias Exactas, F{\'\i}sicas y Naturales },
     pages = {109-111},
     publisher = {mathdoc},
     volume = {75},
     number = {1},
     year = {1981},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/RRACEFN_1981_1981_1_a7/}
}