@InProceedings{kensler:08:tree,
    title      = { {T}ree {R}otations for {I}mproving {B}ounding {V}olume {H}ierarchies },
    author     = { Andrew Kensler },
    booktitle  = { Proceedings of the 2008 IEEE Symposium on Interactive Ray Tracing },
    month      = { Aug },
    year       = { 2008 },
    pages      = { 73--76 },
}