@article{GDZPPN002036398, title = {On a functional inequality.}, journal = {Aequationes mathematicae}, volume = {33}, year = {1987}, pages = {213-215}, zbl = {0625.39012}, url = {http://dml.mathdoc.fr/item/GDZPPN002036398} }
Walorski, Janusz. On a functional inequality.. Aequationes mathematicae, Tome 33 (1987) pp. 213-215. http://gdmltest.u-ga.fr/item/GDZPPN002036398/