Multipliers on Abelian groups

Bargmann, V.: On unitary ray representations of continuous groups. Ann. Math.59, 1–46 (1954). Bourbaki, N.: Topologie Générale. Paris: Hermann 1949. Braconnier, J.: Sur les groupes topologiques localements compacts. J. math. Pures appl.27, 1–85 (1948). Calabi, L.: Sur les extensions des groupes topologiques. Ann. Mat. pur. appl.32, 295–370 (1951). Cartan, H.: Topologie Algébrique. 2e ed. Paris: E.N.S. 1955. Loomis, L.: Abstract Harmonic Analysis. New York: van Nostrand 1953. Mackey, G.: Unitary representations of group extensions I. Acta Math.99, 265–311 (1958). —— Induced representations of locally compact groups I. Ann. Math.55, 101–139 (1952). Montgomery, D., andL. Zippin: Topological Transformation Groups. New York: Interscience 1955. Osima, M.: On the representation of groups of finite order. Math. J. Okayama Univ.1, 33–61 (1952). Schur, I.: Untersuchungen über die Darstellung der endlichen Gruppen durch gebrochene lineare Substitutionen. J. reine angew. Math.132, 85–137 (1906). Weil, A.: L'intégration dans les groupes topologiques et ses applications. Paris: Hermann 1953. Weyl, H.: The Theory of Groups and Quantum Mechanics. New York: Dover.