KHAN, Jashim; CRAIG-LEES, Margaret. ‘Cashless’ transactions: perceptions of money in mobile payments. International Business and Economics Review, [S.l.], v. 1, n. 1, oct. 2009. ISSN 1647-1989. Available at: <http://revistas.ulusofona.pt/index.php/iber/article/view/859>. Date accessed: 22 mar. 2019.