Need for non-visual feedback with long response times in mobile HCI.

Virpi Roto Antti Oulasvirta Need for non-visual feedback with long response times in mobile HCI. 775-781 2005 conf/www/2005si WWW (Special interest tracks and posters) http://doi.acm.org/10.1145/1062745.1062747 db/conf/www/www2005si.html#RotoO05