@article{CRMATH_2014__352_7-8_593_0,
     author = {Dyakonov, Konstantin M.},
     title = {A characterization of {M\"obius} transformations},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {593--595},
     publisher = {Elsevier},
     volume = {352},
     number = {7-8},
     year = {2014},
     doi = {10.1016/j.crma.2014.05.009},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2014.05.009/}
}