@article{GDZPPN002489945,
title = {Differences of Functions and Group Generators for Compact Abelian Groups.},
journal = {Monatshefte f\"ur Mathematik},
volume = {121},
year = {1996},
pages = {355-366},
zbl = {0868.22004},
url = {http://dml.mathdoc.fr/item/GDZPPN002489945}
}
Lo, Wai L.; Nillsen, Rodney. Differences of Functions and Group Generators for Compact Abelian Groups.. Monatshefte für Mathematik, Tome 121 (1996) pp. 355-366. http://gdmltest.u-ga.fr/item/GDZPPN002489945/