@PhdThesis{SCI:She2007b,
  author =    "J.F. Shepherd",
  title =     "Topologic and Geometric Constraint-Based
              Hexahedral Mesh Generation",
  year =      "2007",
  school =    "School of Computing, University of Utah",
  month =     "May",
  keywords =  "meshing, mesh generation",
  url =       "http://www.sci.utah.edu/publications/shepherd07/thesis.pdf",
}