THE JOURNAL EDITORS. Retraction: Practical Work of Digital System Course Based on Virtual Laboratory. International Journal of Online and Biomedical Engineering (iJOE), [S. l.], v. 21, n. 10, p. p. 156, 2025. DOI: 10.3991/ijoe.v21i10.57931. Disponível em: https://online-journals.org/index.php/i-joe/article/view/57931. Acesso em: 26 apr. 2026.