SALIMA MOHAMED KHADER; SANAA AHMED ALSHHOMI. Van Kampen Diagrams and Pictures: Definitions, Operations, and Conversions. African Journal of Advanced Pure and Applied Sciences , [S. l.], v. 4, n. 3, p. 272–284, 2025. DOI: 10.65418/ajapas.v4i3.1384. Disponível em: https://aaasjournals.com/index.php/ajapas/article/view/1384. Acesso em: 24 jan. 2026.