HentoshO. E.; PrykarpatskyyY. A.; BalinskyA. A.; PrykarpatskiA. K. Geometric structures on the orbits of loop diffeomorphism groups and related “heavenly-type” hamiltonian systems. II. Ukrains’kyi Matematychnyi Zhurnal, v. 74, n. 9, p. 1182 - 1200, 8 Nov. 2022.