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@article{MS2_1985__57_166960, author = {Elmer Bonder}, title = {The approximation property for a pair of {Banach} spaces.}, journal = {Mathematica Scandinavica}, pages = {375--385}, publisher = {mathdoc}, volume = {57}, year = {1985}, zbl = {0608.46010}, url = {http://geodesic.mathdoc.fr/item/MS2_1985__57_166960/} }
Elmer Bonder. The approximation property for a pair of Banach spaces.. Mathematica Scandinavica, Tome 57 (1985), pp. 375-385. http://geodesic.mathdoc.fr/item/MS2_1985__57_166960/