@Article{SCI:Tan2002a,
  author =    "H. Tan and J.A. Nairn",
  title =     "Hierarchical, Adaptive, Material Point Method in
              Dynamic Energy Release Rate Calculations",
  journal =   "Computer Methods in Applied Mechanics and
              Engineering",
  volume =    "191",
  number =    "19-20",
  pages =     "2123--2137",
  year =      "2002",
  month =     "March",
  url =       "http://www.sci.utah.edu/publications/Tan2002a/2002_Tan_Nairn_Dynamic_Energy_Release_Rate_Calculations.pdf",
}