@Article{SCI:Ger2012a,
  author =    "S. Gerber and K. Potter",
  title =     "Data Analysis with the Morse-Smale Complex: The
              msr Package for R",
  journal =   "Journal of Statistical Software",
  volume =    "50",
  number =    "2",
  year =      "2012",
  url =       "http://www.sci.utah.edu/publications/gerber11/Gerber_JSS2011.pdf",
}