HentoshO. E., PrykarpatskyyY. A., BalinskyA. A., and PrykarpatskiA. K., “Geometric structures on the orbits of loop diffeomorphism groups and related ‘heavenly-type’ hamiltonian systems. II”, Ukr. Mat. Zhurn., vol. 74, no. 9, pp. 1182 - 1200, Nov. 2022.