@article{MAN_1987__277_164261,
     author = {Fernando Fern\'andez-Carmena},
     title = {The {Witt} {Group} of a {Smooth} {Complex} {Surface.}},
     journal = {Mathematische Annalen},
     pages = {469--482},
     publisher = {mathdoc},
     volume = {277},
     year = {1987},
     zbl = {0641.14004},
     url = {http://geodesic.mathdoc.fr/item/MAN_1987__277_164261/}
}