TY - JOUR AU - R. K. Romanovskii TI - Exponentially splittable hyperbolic systems with two independent variables JO - Sbornik. Mathematics PY - 1988 SP - 335 EP - 349 VL - 61 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1988_61_2_a4/ LA - en ID - SM_1988_61_2_a4 ER -