FUSHCHICH , V. I.; TYCHININ , V. A.; SEROV , N. I. Formula for multiplication of solutions of the Cortevegs—de Fries equations. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 44, n. 5, p. 716–719, 1992. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7972. Acesso em: 6 dec. 2025.