Indrani Medhi S. N. Nagasena Gautama Kentaro Toyama A comparison of mobile money-transfer UIs for non-literate and semi-literate users. 1741-1750 2009 CHI http://doi.acm.org/10.1145/1518701.1518970 conf/chi/2009 db/conf/chi/chi2009.html#MedhiGT09