TY - JOUR AU - Gauthier, P. M. AU - Tarkhanov, N. N. TI - Degenerate Cases of Uniform Approximation by Solutions of Systems with Surjective Symbols JO - Canadian journal of mathematics PY - 1993 SP - 740 EP - 757 VL - 45 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1993-042-5/ DO - 10.4153/CJM-1993-042-5 ID - 10_4153_CJM_1993_042_5 ER -