@TechReport{SCI:Liv2006d,
  author =    "O.E. Livne",
  title =     "Clustering Patches for Multi-Level Refined Grids:
              a Hierarchical Approach",
  number =    "UUSCI-2006-004",
  year =      "2006",
  institution = "University of Utah",
  type =      "{SCI} Institute Technical Report",
  url =       "http://www.sci.utah.edu/publications/SCITechReports/UUSCI-2006-004.pdf",
}