TY - JOUR AU - Kleinfeld, Erwin AU - Kleinfeld, Margaret Humm TI - Rings of type $(\gamma ,\delta )$ without zero divisors are associative JO - Portugaliae mathematica PY - 1977 SP - 65 EP - 77 VL - 36 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PORMA_1977__36_1_115304/ LA - en ID - PORMA_1977__36_1_115304 ER -