1. [B] R. B. Burckel, Weakly almost periodic functions on semigroups, Gordon and Breach, New York- London-Paris 1970.
2. [Di] J. Dixmier, C-Algebras, North Holland, Amsterdam-New York-Oxford 1977.
3. [DS] N. Dunford, J. T. Schwartz, Linear Operators I, Interscience, New York-London 1958.
4. L'algèbre de Fourier d'un groupe localement compact