@article{10_4064_sm_11_1_31_37,
     author = {C. Ryll-Nardzewski},
     title = {Sur les moyennes},
     journal = {Studia Mathematica},
     pages = {31--37},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1950},
     doi = {10.4064/sm-11-1-31-37},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-11-1-31-37/}
}