@article{SM_1967_3_4_a9,
     author = {V. A. Iskovskikh},
     title = {Rational surfaces with a pencil of rational curves},
     journal = {Sbornik. Mathematics},
     pages = {563--587},
     publisher = {mathdoc},
     volume = {3},
     number = {4},
     year = {1967},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1967_3_4_a9/}
}