@article{AUCMP_2005__46_1_a1,
     author = {Zgraja, Tomasz},
     title = {On continuous convex or concave functions with respect to the logarithmic mean},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {3--10},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {2005},
     mrnumber = {2195567},
     zbl = {1098.26008},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/AUCMP_2005__46_1_a1/}
}