@article{AM2_1984__27_137031,
     author = {J. Acz\'el},
     title = {On weighted synthesis of judgements.},
     journal = {Aequationes mathematicae},
     pages = {288--307},
     year = {1984},
     volume = {27},
     zbl = {0543.90003},
     url = {http://geodesic.mathdoc.fr/item/AM2_1984__27_137031/}
}