@TechReport{segovia:09:SHIGI,
	title	= { {Screen} {Space} {Spherical} {Harmonics} {Filters} {for} {Instant} {Global} {Illumination}},
	author	= { Benjamin Segovia and Ingo Wald },
	year	= { 2007 },
	school	= { {Intel} {Corp} },
	number	= {  }
}