@article{10_4064_cm137_2_7,
     author = {Janusz Matkowski},
     title = {Invariance identity in the class
 of generalized quasiarithmetic means},
     journal = {Colloquium Mathematicum},
     pages = {221--228},
     publisher = {mathdoc},
     volume = {137},
     number = {2},
     year = {2014},
     doi = {10.4064/cm137-2-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm137-2-7/}
}