[1]
Y. A. Prykarpatsky and A. M. Samoilenko, “The classical M. A. Buhl problem, its Pfeiffer – Sato solutions and the classical Lagrange – D’Alembert principle for the integrable heavenly type nonlinear equations”, Ukr. Mat. Zhurn., vol. 69, no. 12, pp. 1652–1689, Dec. 2017, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/1811