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@article{AM2_1987__32_137174, author = {Zbigniew Gajda}, title = {A solution to a problem of {J.} {Schwaiger.}}, journal = {Aequationes mathematicae}, pages = {38--44}, publisher = {mathdoc}, volume = {32}, year = {1987}, zbl = {0619.39006}, url = {http://geodesic.mathdoc.fr/item/AM2_1987__32_137174/} }
Zbigniew Gajda. A solution to a problem of J. Schwaiger.. Aequationes mathematicae, Tome 32 (1987), pp. 38-44. http://geodesic.mathdoc.fr/item/AM2_1987__32_137174/