@book{13087,
	author = {Seminaire sur les singularites des surfaces, centre de mathematiques de I'ecole polytechnique, Palaiseau 1976-1977 and Demazure, Michel ; ed.},
	title = {Singularites des surfaces, proceedings of the seminar},
	publisher = {Springer-Verlag},
	year = {1980},
	address = {Berlin}
}