@article{00772761, title = {Refinement of an inequality of E. Landau.}, journal = {Acta Mathematica Universitatis Comenianae. New Series}, volume = {62}, year = {1993}, pages = {13-16}, zbl = {0823.30004}, language = {en}, url = {http://dml.mathdoc.fr/item/00772761} }
Alzer, H. Refinement of an inequality of E. Landau.. Acta Mathematica Universitatis Comenianae. New Series, Tome 62 (1993) pp. 13-16. http://gdmltest.u-ga.fr/item/00772761/