TY - JOUR AU - Ahmad, M. Iftikhar TI - Quadruple integral equations and operators of fractional integration JO - Glasgow mathematical journal PY - 1971 SP - 60 EP - 64 VL - 12 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089500001154/ DO - 10.1017/S0017089500001154 ID - 10_1017_S0017089500001154 ER -