HAITHAM ABBOOD, Wisam. Low Cost Reversible Signed Converter. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 13, n. 4, p. 106–111, 2009. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1520.. Acesso em: 13 jun. 2026.