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@article{AM2_1989__38_1_137326, author = {S\'andor Szab\'o}, title = {On a problem of {A.D.} {Sands.}}, journal = {Aequationes mathematicae}, pages = {186--191}, publisher = {mathdoc}, volume = {38}, number = {1}, year = {1989}, zbl = {0685.20023}, url = {http://geodesic.mathdoc.fr/item/AM2_1989__38_1_137326/} }
Sándor Szabó. On a problem of A.D. Sands.. Aequationes mathematicae, Tome 38 (1989) no. 1, pp. 186-191. http://geodesic.mathdoc.fr/item/AM2_1989__38_1_137326/