@article{MAN_1964__157_161241,
     author = {K. Menger},
     title = {Superassociative {Systems} and {Logical} {Functors.}},
     journal = {Mathematische Annalen},
     pages = {278--295},
     publisher = {mathdoc},
     volume = {157},
     year = {1964},
     zbl = {0126.03601},
     url = {http://geodesic.mathdoc.fr/item/MAN_1964__157_161241/}
}