Ambrose, Warren (1945). “Structure theorems for a special class of Banach algebras” (영어). 《Transactions of the American Mathematical Society》 57: 364–386. doi:10.1090/S0002-9947-1945-0013235-8. MR13235.
Arens, Richard Friedrich (1951). “The adjoint of a bilinear operation” (영어). 《Proceedings of the American Mathematical Society》 2: 839–848. doi:10.1090/S0002-9939-1951-0045941-1. MR45941.
Ambrose, Warren (1945). “Structure theorems for a special class of Banach algebras” (영어). 《Transactions of the American Mathematical Society》 57: 364–386. doi:10.1090/S0002-9947-1945-0013235-8. MR13235.
Arens, Richard Friedrich (1951). “The adjoint of a bilinear operation” (영어). 《Proceedings of the American Mathematical Society》 2: 839–848. doi:10.1090/S0002-9939-1951-0045941-1. MR45941.