@TechReport{RSG2006_balloon,
  author      = { Damien Rohmer and Arkadiusz Sitek and Grant T. Gullberg },
  title       = { Simulation of the Beating Heart Based on Physically Modeling a Deformable balloon },
  institution = { Lawrence Berkeley National Laboratory, LBNL-60664 },
  year        = { 2006 },
}