@article{MAN_1977__228_162988,
     author = {Eiji Horikawa},
     title = {Surjectivity of the {Period} {Map} of {K} 3 {Surfaces} of {Degree} 2.},
     journal = {Mathematische Annalen},
     pages = {113--146},
     publisher = {mathdoc},
     volume = {228},
     year = {1977},
     zbl = {0333.32020},
     url = {http://geodesic.mathdoc.fr/item/MAN_1977__228_162988/}
}