@article{TM_1976_142_a19,
     author = {L. A. Takhtadzhyan and L. D. Faddeev},
     title = {The {Hamiltonian} system connected with the equation $u_{\xi_\eta}+\sin u=0$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {254--266},
     publisher = {mathdoc},
     volume = {142},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1976_142_a19/}
}