%0 Journal Article %A F. A. Smirnov %T Proof of identities which arise in the calculation of form-factors in the sine-Gordon model %J Zapiski Nauchnykh Seminarov POMI %D 1987 %P 98-121 %V 161 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1987_161_a8/ %G ru %F ZNSL_1987_161_a8