@article{GDZPPN002550431, title = {A generalization of Bellman's functional equation.}, journal = {Aequationes mathematicae}, volume = {20}, year = {1980}, pages = {236-245}, zbl = {0467.39003}, url = {http://dml.mathdoc.fr/item/GDZPPN002550431} }
Kardos, Peter. A generalization of Bellman's functional equation.. Aequationes mathematicae, Tome 20 (1980) pp. 236-245. http://gdmltest.u-ga.fr/item/GDZPPN002550431/