@Article{SCI:Ber2018a,
  author =    "M. Berzins",
  title =     "Nonlinear stability and time step selection for
              the MPM method",
  journal =   "Computational Particle Mechanics",
  year =      "2018",
  month =     "Jan",
  issn =      "2196-4386",
  doi =       "10.1007/s40571-018-0182-y",
  url =       "http://www.sci.utah.edu/publications/Ber2018a/mpmstabSpringer2.pdf",
}