@PhDThesis{kensler:11:dissertation,
    title      = { {S}oftware {A}lgorithms for {H}ardware {R}ay {T}racing },
    author     = { Andrew Kensler },
    month      = { May },
    year       = { 2011 },
    school     = { The University of Utah },
    type       = { {P}h.{D}. dissertation },
}