Alexander Ng, Stephen Brewster, John Williamson. The Impact of Encumbrance on Mobile Interactions. Paula Kotzé; Gary Marsden; Gitte Lindgaard; Janet Wesson; Marco Winckler. 14th International Conference on Human-Computer Interaction (INTERACT), Sep 2013,
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Alexander Ng, Stephen Brewster, John Williamson. The Impact of Encumbrance on Mobile Interactions.