SIDDIQ MAHMOUD, A.; عمار; IBRAHIM BAKR, R.; راویة. The hybrid Morse code. Journal of Education and Science (JES), [S. l.], v. 28, n. 1, p. 294–311, 2019. DOI: 10.33899/edusj.2019.161056. Disponível em: https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17462. Acesso em: 4 aug. 2025.