@article{ELMA_1981__36_141262,
     author = {J. Steinig},
     title = {Inequalities involving convex sequences.},
     journal = {Elemente der Mathematik},
     pages = {58--72},
     year = {1981},
     volume = {36},
     zbl = {0442.26012},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1981__36_141262/}
}