@article{MAN_1980__252_163449,
     author = {Selman Akbulut and Robion Kirby},
     title = {Branched {Covers} of {Surfaces} in {4-Manifolds.}},
     journal = {Mathematische Annalen},
     pages = {111--132},
     publisher = {mathdoc},
     volume = {252},
     year = {1980},
     zbl = {0421.57002},
     url = {http://geodesic.mathdoc.fr/item/MAN_1980__252_163449/}
}