د. نضال حماد على حماد. The Impact of Work accidents on Productive efficiency in Sudan some factories: (A case study of operate in the White Nile State). White Nile Journal for Studies and Research, [S. l.], n. 18, p. 9–27, 2021. Disponível em: https://journals.wnu.edu.sd/index.php/wnjsr/article/view/106. Acesso em: 13 jun. 2026.