@InProceedings{benthin:09:MFT,
	title	= { {Efficient} {ray} {traced} {soft} {shadows} {using} {multi-frusta} {tracing}},
	author	= { Carsten Benthin and Ingo Wald },
	booktitle	= { {Proceedings} {of} {High-Performance} {Graphics} {2009} {(HPG09)} }
}