Eric Harris Geraldine Fitzpatrick Yvonne Rogers Sara Price Ted Phelps Cliff Randell From Snark to Park: Lessons Learnt Moving Pervasive Experiences From Indoors to Outdoors. 39-48 2004 conf/auic/2004 AUIC http://crpit.com/confpapers/CRPITV28Harris.pdf db/conf/auic/auic2004.html#HarrisFRPPR04