%0 Journal Article %A R. F. Bikbaev %T Integrable boundary-value problems and nonlinear Fourier harmonics %J Zapiski Nauchnykh Seminarov POMI %D 1992 %P 43-50 %V 199 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1992_199_a3/ %G ru %F ZNSL_1992_199_a3