@article{AM2_1981__23_136899,
     author = {P. Fischer and J.P. Mokansi},
     title = {A class of symmetric biadditive functionals. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {124--125},
     publisher = {mathdoc},
     volume = {23},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/AM2_1981__23_136899/}
}