Koparan, Murat. “Derivation of Sawada-Kotera and Kaup-Kupershmidt Equations KdV Flow Equations from Derivative Nonlinear Schrödinger Equation (DNLS)”. Results in Nonlinear Analysis 8, no. 1 (January 17, 2025): 32–40. Accessed May 5, 2025. https://www.nonlinear-analysis.com/index.php/pub/article/view/540.