@Inproceedings { hapala:sccg2011,
   title = {Efficient Stack-less BVH Traversal for Ray Tracing},
   year = {2011},
   url = {http://graphics.cg.uni-saarland.de/?id=hapalasccg2011},
   booktitle = {27th Spring Conference on Computer Graphics (SCCG 2011)},
   state = {unpublished},
   author = {Hapala, Michal and Davidovic, Tomas and Wald, Ingo and Havran, Vlastimil and Philipp Slusallek}
}