@article{ARM_1990_26_2-3_a1,
     author = {Alsina, Claudi and Garc{\'\i}a Roig, Jaime L.},
     title = {On some inequalities characterizing the exponential function},
     journal = {Archivum mathematicum},
     pages = {67--71},
     year = {1990},
     volume = {26},
     number = {2-3},
     mrnumber = {1188264},
     zbl = {0735.39006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1990_26_2-3_a1/}
}