@article{GDZPPN002034328, title = {Measuring uncertainty without a norm.}, journal = {Aequationes mathematicae}, volume = {26}, year = {1983}, pages = {74-82}, zbl = {0547.41029}, url = {http://dml.mathdoc.fr/item/GDZPPN002034328} }
Werschulz, Arthur G. Measuring uncertainty without a norm.. Aequationes mathematicae, Tome 26 (1983) pp. 74-82. http://gdmltest.u-ga.fr/item/GDZPPN002034328/