@Article{SCI:Wal2007a,
  author =    "I. Wald and S. Boulos and P. Shirley",
  title =     "Ray Tracing Deformable Scenes using Dynamic
              Bounding Volume Hierarchies",
  journal =   "ACM Transactions on Graphics",
  volume =    "26",
  number =    "1",
  year =      "2007",
  keywords =  "rtcenter",
  url =       "http://www.sci.utah.edu/publications/wald07/togbvh.pdf",
}