“Homoclinic Orbit in a Six Dimensional Model of a Perturbed Higher-order NLS Equation”, J. Part. Diff. Eq., vol. 16, no. 1, pp. 18–28, Feb. 2003, Accessed: Dec. 05, 2025. [Online]. Available: https://www.global-sci.com/index.php/jpde/article/view/14866