@article{SM_1971_13_4_a9,
     author = {A. A. Bel'skii},
     title = {Rational intersection points of two hyperquadrics},
     journal = {Sbornik. Mathematics},
     pages = {631--642},
     year = {1971},
     volume = {13},
     number = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1971_13_4_a9/}
}