SMILGA, A. Modified Korteweg-de Vries equation as a system with benign ghosts. Acta Polytechnica, [S. l.], v. 62, n. 1, p. 190–196, 2022. DOI: 10.14311/AP.2022.62.0190. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/7669. Acesso em: 8 may. 2024.