@article{knoll:08:cgrtia,
	title	= {{Fast Ray Tracing of Arbitrary Implicit Surfaces with Interval and Affine Arithmetic}},
	author	= { Aaron Knoll and Younis Hijazi and Andrew Kensler and Mathias Schott and Charles Hansen and Hans Hagen },
	year	= { 2008 },
	booktitle	= {Computer Graphics Forum (to appear)}
}