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@article{MS2_1980__46_166694, author = {Robert Magnus}, title = {A splitting lemma for non-reflexive {Banach} spaces.}, journal = {Mathematica Scandinavica}, pages = {118--128}, publisher = {mathdoc}, volume = {46}, year = {1980}, zbl = {0436.58005}, url = {http://geodesic.mathdoc.fr/item/MS2_1980__46_166694/} }
Robert Magnus. A splitting lemma for non-reflexive Banach spaces.. Mathematica Scandinavica, Tome 46 (1980), pp. 118-128. http://geodesic.mathdoc.fr/item/MS2_1980__46_166694/