Mumford, David2010-01-051961Mumford, David B. 1961. The topology of normal singularities of an algebraic surface and a criterion for simplicity. Publications Mathématiques de l’Institut des Hautes Scientifiques 9(1): 5-22.0073-83011618-1913http://nrs.harvard.edu/urn-3:HUL.InstRepos:3450064en-USThe Topology of Normal Singularities of an Algebraic Surface and a Criterion for SimplicityJournal Article2010-01-0510.1007/BF02698717