TY - JOUR AU - Cohn, Richard M. TI - A Difference-Differential Basis Theorem JO - Canadian journal of mathematics PY - 1970 SP - 1224 EP - 1237 VL - 22 IS - 6 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-141-3/ DO - 10.4153/CJM-1970-141-3 ID - 10_4153_CJM_1970_141_3 ER -