@article{ZNSL_1987_161_a8,
     author = {F. A. Smirnov},
     title = {Proof of identities which arise in the calculation of form-factors in the {sine-Gordon} model},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {98--121},
     publisher = {mathdoc},
     volume = {161},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1987_161_a8/}
}