A Study Of Strengthening Circular Diaphragm By Ring-Shaped Concentric Ribs. Al-Khwarizmi Engineering Journal, [S. l.], v. 2, n. 1, p. 15–34, 2017. Disponível em: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/2.. Acesso em: 5 nov. 2024.