@article{STO_1981_1981_1_a4,
     author = {Burillo L\'opez, Pedro J. and Aguilella Almer, Joaqu{\'\i}n},
     title = {Geometr{\'\i}a de gramianos en el espacio de {Hilbert.}},
     journal = {Stochastica},
     pages = {5-24},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1981},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/STO_1981_1981_1_a4/}
}