@TechReport{knolla:07:ImplicitsTR,
	title	= { {Interactive} {Ray} {Tracing} {of} {Arbitrary} {Implicit} {Functions}},
	author	= { Aaron Knoll and Younis Hijazi and Charles D Hansen and Ingo Wald and Hans Hagen },
	year	= { 2007 },
	school	= { {SCI} {Institute,} {University} {of} {Utah} },
	number	= { {UUSCI-2007-002} }
}