TY - JOUR AU - I. V. Vyugin AU - R. I. Levin TI - On the Riemann--Hilbert problem for difference and $q$-difference systems JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 2017 SP - 326 EP - 343 VL - 297 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_2017_297_a17/ LA - ru ID - TM_2017_297_a17 ER -