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@article{PORMA_1987__44_1_115566, author = {Jain, P.K. and Ahmad, Khalil}, title = {Schauder decomposition and best approximation in {Banach} {Spaces}}, journal = {Portugaliae mathematica}, pages = {25--39}, publisher = {mathdoc}, volume = {44}, number = {1}, year = {1987}, mrnumber = {0911830}, zbl = {0636.41016}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1987__44_1_115566/} }
Jain, P.K.; Ahmad, Khalil. Schauder decomposition and best approximation in Banach Spaces. Portugaliae mathematica, Tome 44 (1987) no. 1, pp. 25-39. http://geodesic.mathdoc.fr/item/PORMA_1987__44_1_115566/