WEAKLY NONLINEAR WAVES WITH SLOWLY-VARYING SPEED. Nigerian Journal of Technology, [S. l.], v. 2, n. 1, p. 23–29, 2002. DOI: 10.4314/njt.21.333. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/333. Acesso em: 4 jun. 2026.