JÚNIOR, Demétrio Mendonça; DALLAGNOL, Mathäus Freitag; MARTINS, Vanessa Quadros; FREITAG, Viviane Costa. Evaluation of E-Commerce Systems: Comparative Study Before and During the COVID-19 Pandemic. Journal of Information Systems and Technology Management, [S. l.], v. 20, 2023. Disponível em: https://jistem.tecsi.org/index.php/jistem/article/view/3182. Acesso em: 13 mar. 2025.