@article  {Cohen-1994-PCA,
	author=		"D. Cohen and Z. Sheffer ",
	journal=	"The Visual Computer ",
	month=		"November ",
	number=		"11 ",
	pages=		"27--28 ",
	title=		"Proximity clouds - an acceleration technique for 3D grid traversal ",
	volume=		"10 ",
	year=		"1994",
	theme=		"tech and medicine and art",
	project=	"wrist",
	added-by=	"Cagatay Demiralp",
	date-added=	"Wed Nov  6 00:17:58 EST 2002"
}
@article  {Cohen-1994-PCA-url,
	author=		"D. Cohen and Z. Sheffer ",
	journal=	"The Visual Computer ",
	month=		"November ",
	note=		" \url{http://vis.cs.brown.edu/results/bibtex/Cohen-1994-PCA.bib}{(bibtex: Cohen-1994-PCA)}",
	number=		"11 ",
	pages=		"27--28 ",
	title=		"Proximity clouds - an acceleration technique for 3D grid traversal ",
	volume=		"10 ",
	year=		"1994",
	theme=		"tech and medicine and art",
	project=	"wrist",
	added-by=	"Cagatay Demiralp",
	date-added=	"Wed Nov  6 00:17:58 EST 2002"
}