Nadir Weibel Adriana Ispas Beat Signer Moira C. Norrie Paperproof: a paper-digital proof-editing system. 2349-2354 2008 CHI Extended Abstracts http://doi.acm.org/10.1145/1358628.1358682 conf/chi/2008a db/conf/chi/chi2008a.html#WeibelISN08