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@article{AA_1991_3_1_a1, author = {M. V. Babich}, title = {Smoothness of real finite-gap solutions of equations connected with the {sine-Gordon} equation}, journal = {Algebra i analiz}, pages = {57--66}, publisher = {mathdoc}, volume = {3}, number = {1}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AA_1991_3_1_a1/} }
M. V. Babich. Smoothness of real finite-gap solutions of equations connected with the sine-Gordon equation. Algebra i analiz, Tome 3 (1991) no. 1, pp. 57-66. http://geodesic.mathdoc.fr/item/AA_1991_3_1_a1/