HentoshO. E., PrykarpatskyyYa. A., BalinskyA. A., and PrykarpatskiA. K. “Geometric Structures on the Orbits of Loop Diffeomorphism Groups and Related ‘heavenly-type’ Hamiltonian Systems. II”. Ukrains’kyi Matematychnyi Zhurnal 74, no. 9 (November 8, 2022): 1182 - 1200. Accessed November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7234.