An investigation into the performance of counter rotating floating ring journal under different working conditions. Al-Khwarizmi Engineering Journal, [S. l.], v. 3, n. 1, p. 26–39, 2007. Disponível em: https://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/618. Acesso em: 6 apr. 2025.