CURRENT STATE OF THE UKRAINIAN MARKET OF ELECTRONIC PAYMENT SYSTEMS. World of finance, [S. l.], n. 2(67), p. 118–128, 2021. DOI: 10.35774/sf2021.02.118. Disponível em: http://sf.wunu.edu.ua/index.php/wof/article/view/1453. Acesso em: 15 dec. 2025.