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@article{AM2_1992__43_1_137445, author = {S.P. Zhou}, title = {On a problem of {Davison.}}, journal = {Aequationes mathematicae}, pages = {90--93}, publisher = {mathdoc}, volume = {43}, number = {1}, year = {1992}, zbl = {0757.39001}, url = {http://geodesic.mathdoc.fr/item/AM2_1992__43_1_137445/} }
S.P. Zhou. On a problem of Davison.. Aequationes mathematicae, Tome 43 (1992) no. 1, pp. 90-93. http://geodesic.mathdoc.fr/item/AM2_1992__43_1_137445/