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@article{AM2_1977__16_136698, author = {R.G. Laha and E. Lukacs}, title = {On a functional equation which occurs in a characterization problem.}, journal = {Aequationes mathematicae}, pages = {259--274}, publisher = {mathdoc}, volume = {16}, year = {1977}, zbl = {0382.60018}, url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136698/} }
R.G. Laha; E. Lukacs. On a functional equation which occurs in a characterization problem.. Aequationes mathematicae, Tome 16 (1977), pp. 259-274. http://geodesic.mathdoc.fr/item/AM2_1977__16_136698/