TY - JOUR AU - I. M. Gel'fand AU - M. I. Graev AU - V. S. Retakh TI - General hypergeometric systems of equations and series of hypergeometric type JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1992 SP - 1 EP - 88 VL - 47 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1992_47_4_a0/ LA - en ID - RM_1992_47_4_a0 ER -