@article{MAN_1988__282_2_164456, author = {C\'esar Camacho}, title = {Quadratic {Forms} and {Holomorphic} {Foliations} on {Singular} {Surfaces.}}, journal = {Mathematische Annalen}, pages = {177--184}, publisher = {mathdoc}, volume = {282}, number = {2}, year = {1988}, zbl = {0657.32007}, url = {http://geodesic.mathdoc.fr/item/MAN_1988__282_2_164456/} }