@article{00011587, title = {An extension of Helson-Edwards theorem to Banach modules.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {14}, year = {1991}, pages = {227-232}, doi = {10.1155/S0161171291000248}, zbl = {0765.46035}, language = {en}, url = {http://dml.mathdoc.fr/item/00011587} }
Takahasi, Sin-Ei. An extension of Helson-Edwards theorem to Banach modules.. International Journal of Mathematics and Mathematical Sciences, Tome 14 (1991) pp. 227-232. doi : 10.1155/S0161171291000248. http://gdmltest.u-ga.fr/item/00011587/