@article{MZ_1991__207_2_174253,
     author = {Hans Sterk},
     title = {Compactifications of the period space of {Enriques} surfaces.},
     journal = {Mathematische Zeitschrift},
     pages = {1--36},
     publisher = {mathdoc},
     volume = {207},
     number = {2},
     year = {1991},
     zbl = {0736.14017},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__207_2_174253/}
}