@article{IM_1981__65_142850,
     author = {N. Mohan Kumar},
     title = {Rational {Double} {Points} on a {Rational} {Surface.}},
     journal = {Inventiones mathematicae},
     pages = {251--268},
     publisher = {mathdoc},
     volume = {65},
     year = {1981},
     zbl = {0478.14026},
     url = {http://geodesic.mathdoc.fr/item/IM_1981__65_142850/}
}