@article{ZNSL_1985_146_a0,
     author = {N. M. Bogolyubov and A. S. Budagov},
     title = {On the {Poisson} structure for the matrix {Sine--Gordon} equation},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {3--8},
     publisher = {mathdoc},
     volume = {146},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1985_146_a0/}
}