@article{GAMA_1965_1965_1_a1,
     author = {A. F. T.},
     title = {Nota sobre manipulaci\'on de matrices booleanas.},
     journal = {Gaceta matem\'atica},
     pages = {18-21},
     publisher = {mathdoc},
     volume = {17},
     number = {1-2},
     year = {1965},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/GAMA_1965_1965_1_a1/}
}