LENELLS, J. Stability for the periodic Camassa-Holm equation. MATHEMATICA SCANDINAVICA, [S. l.], v. 97, n. 2, p. 188–200, 2005. DOI: 10.7146/math.scand.a-14971. Disponível em: https://www.mscand.dk/article/view/14971. Acesso em: 2 may. 2024.