@article{10_4064_cm_62_2_279_281,
     author = {V. Faber and M. Kuczma and J. Mycielski},
     title = {Some models of plane geometries and a functional equation},
     journal = {Colloquium Mathematicum},
     pages = {279--281},
     publisher = {mathdoc},
     volume = {62},
     number = {2},
     year = {1991},
     doi = {10.4064/cm-62-2-279-281},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-62-2-279-281/}
}