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@article{AM2_1989__38_1_137320, author = {L\'aszl\'o Sz\'ekelyhidi}, title = {On a linear functional equation.}, journal = {Aequationes mathematicae}, pages = {113--122}, publisher = {mathdoc}, volume = {38}, number = {1}, year = {1989}, zbl = {0686.39012}, url = {http://geodesic.mathdoc.fr/item/AM2_1989__38_1_137320/} }
László Székelyhidi. On a linear functional equation.. Aequationes mathematicae, Tome 38 (1989) no. 1, pp. 113-122. http://geodesic.mathdoc.fr/item/AM2_1989__38_1_137320/