@article{PIM_1964_N_S_04_18_a7,
     author = {J. Acz\'el},
     title = {On {A} {Generalization} {Of} {The} {Functional} {Equations} {Of} {Pexider}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {77 },
     publisher = {mathdoc},
     volume = {_N_S_04},
     number = {18},
     year = {1964},
     url = {http://geodesic.mathdoc.fr/item/PIM_1964_N_S_04_18_a7/}
}