CHEN, Y. On existence theorems of periodic traveling wave solution to the generalized forced Kadomtsev-Petviashvili equation. Archives of Mechanics, Warsaw, Poland, v. 48, n. 5, p. 925–931, 1996. Disponível em: http://am.ippt.gov.pl/index.php/am/article/view/v48p925. Acesso em: 17 jan. 2026.