TY - JOUR AU - Cross, G. E. TI - On the Generality of the AP-Integral JO - Canadian journal of mathematics PY - 1971 SP - 557 EP - 561 VL - 23 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1971-062-8/ DO - 10.4153/CJM-1971-062-8 ID - 10_4153_CJM_1971_062_8 ER -