%0 Journal Article %A Dmitry K. Demskoi %T The Lattice Sine-Gordon Equation as a Superposition Formula for an NLS-Type System %J Symmetry, integrability and geometry: methods and applications %D 2021 %V 17 %U http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a107/ %G en %F SIGMA_2021_17_a107