ARTUR BORCUCH. The statistical analysis of availability feature for payment cards with contactless payment function, cash and mobile payments in Poland. Results of own research . International Journal on Integrated Education, [S. l.], v. 3, n. 2, p. 56–61, 2020. DOI: 10.31149/ijie.v3i2.13. Disponível em: https://journals.researchparks.org/index.php/IJIE/article/view/13. Acesso em: 7 dec. 2025.