@article{GDZPPN002323516, title = {On a Problem of H. Berens.}, journal = {Mathematische Annalen}, volume = {264}, year = {1983}, pages = {279-282}, zbl = {0534.41022}, url = {http://dml.mathdoc.fr/item/GDZPPN002323516} }
Godini, G. On a Problem of H. Berens.. Mathematische Annalen, Tome 264 (1983) pp. 279-282. http://gdmltest.u-ga.fr/item/GDZPPN002323516/