SHEMET, A. D. Forms of e-commerce and its place in the system of digital economy. Science and Transport Progress , [S. l.], n. 41, p. 311–315, 2012. DOI: 10.15802/stp2012/9176. Disponível em: https://stp.ust.edu.ua/article/view/9176. Acesso em: 6 may. 2024.