@Book{BDG201892317096, title = "Surfaces du second degr\'{e} trait\'{e}es synth\'{e}tiquement", author = "Brasseur, J.-B", publisher = "Li\'{e}ge : [s.n.]", editor = "[s.n.]", URL = "http://biblioteca.galiciana.gal/es/consulta/registro.do?id=342898", year = "1842", }