@article{PMIHES_1961__9__5_0,
     author = {Mumford, David},
     title = {The topology of normal singularities of an algebraic surface and a criterion for simplicity},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {5--22},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {9},
     year = {1961},
     mrnumber = {27 #3643},
     zbl = {0108.16801},
     language = {en},
     url = {http://archive.numdam.org/item/PMIHES_1961__9__5_0/}
}