@article{MAN_1981__255_182840,
     author = {Peter Russell},
     title = {On {Affine-Ruled} {Rational} {Surfaces.}},
     journal = {Mathematische Annalen},
     pages = {287--302},
     year = {1981},
     volume = {255},
     zbl = {0438.14024},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__255_182840/}
}