@article{CMH_1949__22_138968,
     author = {H. Jecklin},
     title = {Versuch einer {Systematik} des mathematischen {Mittelwertbegriffs.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {260--270},
     publisher = {mathdoc},
     volume = {22},
     year = {1949},
     zbl = {0034.18402},
     url = {http://geodesic.mathdoc.fr/item/CMH_1949__22_138968/}
}