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@article{PORMA_1978__37_3-4_115356, author = {Tita, N.}, title = {$E_{\phi ,\varphi }$ operators between normed spaces}, journal = {Portugaliae mathematica}, pages = {255--258}, publisher = {mathdoc}, volume = {37}, number = {3-4}, year = {1978}, mrnumber = {0633032}, zbl = {0466.47014}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1978__37_3-4_115356/} }
Tita, N. $E_{\phi ,\varphi }$ operators between normed spaces. Portugaliae mathematica, Tome 37 (1978) no. 3-4, pp. 255-258. http://geodesic.mathdoc.fr/item/PORMA_1978__37_3-4_115356/