@article{CM_1989__72_2_121_0,
     author = {O'Grady, Kieran G.},
     title = {On the {Kodaira} dimension of moduli spaces of abelian surfaces},
     journal = {Compositio Mathematica},
     pages = {121--163},
     publisher = {Kluwer Academic Publishers},
     volume = {72},
     number = {2},
     year = {1989},
     mrnumber = {1030139},
     zbl = {0711.14025},
     language = {en},
     url = {http://www.numdam.org/item/CM_1989__72_2_121_0/}
}