David R. Millen, and John F. Patterson. CHI Extended Abstracts, page 720-721. ACM, (2003)http://doi.acm.org/10.1145/765891.765950 . isbn 1-58113-637-4 .
http://dblp.uni-trier.de/db/conf/chi/chi2003a.html#MillenP03.
David R. Millen, and John F. Patterson. CHI Extended Abstracts, page 720-721. ACM, (2003)http://doi.acm.org/10.1145/765891.765950 . isbn 1-58113-637-4 .
http://dblp.uni-trier.de/db/conf/chi/chi2003a.html#MillenP03.