KISIEL, Michał. Funding sources in mobile payments systems. Copernican Journal of Finance & Accounting, [S. l.], v. 2, n. 2, p. 61–73, 2013. DOI: 10.12775/CJFA.2013.016. Disponível em: https://apcz.umk.pl/CJFA/article/view/CJFA.2013.016. Acesso em: 9 jan. 2025.