R. Z. Zhdanov, “Integrability of Riccati equations and stationary Korteweg-de vries equations”, Ukr. Mat. Zhurn., vol. 51, no. 6, pp. 856–860, Jun. 1999, Accessed: Apr. 23, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4674