ANIEDU A N; OKEZIE C C; EZE C E; UDEGBUNAM E U. Keypad Controlled Dot Matrix Display. International Journal of Progressive Research in Science and Engineering , [S. l.], v. 2, n. 6, p. 41–45, 2021. Disponível em: https://journal.ijprse.com/index.php/ijprse/article/view/295. Acesso em: 2 may. 2024.