1. Some large and small sets in topological groups;Artico;Math. Pannon.,2001
2. Sur quelques propriétés arithmétiques des presque-périodes;Bogoliouboff;Ann. Chaire Phys. Math., Kiev,1939
3. H. Bohr, Collected mathematical works, in: E. Følner, B Jessen (Eds.), Dansk Matemetitisk Forsening, 1952.
4. Sur le mesure de Haar;Cartan;C. R. Acad. Sci. Paris,1940
5. Topologies induced by groups of characters;Comfort;Fund. Math.,1964