@InProceedings{SCI:Ber2021a,
  author =    "M. Berzins",
  title =     "Symplectic Time Integration Methods for the
              Material Point Method, Experiments, Analysis and
              Order Reduction",
  booktitle = "WCCM-ECCOMAS2020 virtual Conference",
  year =      "2021",
  month =     "January",
  url =       "http://www.sci.utah.edu/publications/Ber2021a/WCCM20_MBERZINS.pdf",
}