@inproceedings{inproceedingsaca27de8, title = {Business models for SAT: sistema autenticador e transmissor de cupons fiscais eletrĂ´nicos}, author = {Melo, Augusto Zapparoli Castro Melo and Fontana, Caio Fernando and Sakurai, Cledson Akio and Dias, Eduardo Mario}, year = {2011} }