@InProceedings{Goesele:2003:ALS,
	author = {Michael Goesele and Xavier Granier and Wolfgang Heidrich and Hans-Peter Seidel},
	title = {Accurate Light Source Acquisition and Rendering},
	booktitle = {Proc. of SIGGRAPH '03 (Special issue of ACM Transactions on Graphics)},
	year = 2003,
	month = jul,
	pages = {621--630},
}