NNAKWUZIE, DORIS NKECHI, A. C. I. D. M. A. M. N. Development Of Mobile Payment System: An Implementation Of Cashless Economy. International Journal of Engineering and Computer Science, india, v. 4, n. 06, 2015. Disponível em: http://ijecs.in/index.php/ijecs/article/view/3918. Acesso em: 7 may. 2024.