TY - JOUR AU - Dmitry K. Demskoi TI - The Lattice Sine-Gordon Equation as a Superposition Formula for an NLS-Type System JO - Symmetry, integrability and geometry: methods and applications PY - 2021 VL - 17 UR - http://geodesic.mathdoc.fr/item/SIGMA_2021_17_a107/ LA - en ID - SIGMA_2021_17_a107 ER -