Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

	1	ARTOOLKIT 2002 http://www.washington.edu/artoolkit/
	2	BILLINGHURST, M., Kato, H., Poupyrev, I. (2001) The MagicBook: A Transitional AR Interface. Computers and Graphics, November 2001, pp. 745-753.
	3	Hiroshi Ishii , Minoru Kobayashi , Kazuho Arita, Iterative design of seamless collaboration media, Communications of the ACM, v.37 n.8, p.83-97, Aug. 1994  [doi>10.1145/179606.179687]
	4	Hiroshi Ishii , Brygg Ullmer, Tangible bits: towards seamless interfaces between people, bits and atoms, Proceedings of the SIGCHI conference on Human factors in computing systems, p.234-241, March 22-27, 1997, Atlanta, Georgia, United States  [doi>10.1145/258549.258715]
	5	Matthew Turk , George Robertson, Perceptual user interfaces (introduction), Communications of the ACM, v.43 n.3, p.32-34, March 2000  [doi>10.1145/330534.330535]

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