@article{2738, author = {Dash, A.T.}, title = {Joint essential range}, journal = {Portugaliae mathematica}, volume = {33}, year = {1974}, pages = {133-135}, zbl = {0334.28006}, mrnumber = {0355566}, language = {en}, url = {http://dml.mathdoc.fr/item/2738} }
Dash, A.T. Joint essential range. Portugaliae mathematica, Tome 33 (1974) pp. 133-135. http://gdmltest.u-ga.fr/item/2738/