@article{AM2_1993__46_2-3_137558,
     author = {Horst Alzer},
     title = {An inequality for arithmetic and harmonic means.},
     journal = {Aequationes mathematicae},
     pages = {257--263},
     publisher = {mathdoc},
     volume = {46},
     number = {2-3},
     year = {1993},
     zbl = {0785.26012},
     url = {http://geodesic.mathdoc.fr/item/AM2_1993__46_2-3_137558/}
}