In: CHI '09: Proceedings of the 27th international conference on Human factors in computing systems

Publisher: ACM
Copyright 2009 ACM 978-1-60558-246-7/09/04 Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. CHI 2009, April 4–9, 2009, Boston, Massachusetts, USA.

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