Franck Poirier Hamed H. Sad A New Performance Measure Taking into Account the Mental Load in Mobile Text Entry Tasks. 653-656 2007 conf/interact/2007-2 INTERACT (2) http://dx.doi.org/10.1007/978-3-540-74800-7_72 db/conf/interact/interact2007-2.html#PoirierS07