@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/