@InProceedings{SCI:Wal2007g,
  author =    "P.C. Wallstedt and J.E. Guilkey",
  title =     "Improved Velocity Projection for the Material
              Point Method",
  subtitle =  "Computer Modeling in Engineering and Sciences",
  volume =    "19",
  number =    "3",
  pages =     "223--232",
  year =      "2007",
  url =       "http://www.sci.utah.edu/publications/Wal2007g/Wallstedt_CMES2007.pdf",
}