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@article{AM2_1981__22_136872, author = {L. Flatto and D. Jacobson}, title = {Functions satisfying a discrete mean value property.}, journal = {Aequationes mathematicae}, pages = {173--193}, publisher = {mathdoc}, volume = {22}, year = {1981}, zbl = {0486.31005}, url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136872/} }
L. Flatto; D. Jacobson. Functions satisfying a discrete mean value property.. Aequationes mathematicae, Tome 22 (1981), pp. 173-193. http://geodesic.mathdoc.fr/item/AM2_1981__22_136872/