@article{MM2_1992__75_4_155724,
     author = {Hisao Yoshihara},
     title = {Double coverings of rational surface.},
     journal = {Manuscripta mathematica},
     pages = {279--292},
     publisher = {mathdoc},
     volume = {75},
     number = {4},
     year = {1992},
     zbl = {0755.12004},
     url = {http://geodesic.mathdoc.fr/item/MM2_1992__75_4_155724/}
}