@article{1093956554,
author = {Clay, Robert E.},
title = {The number of moduli in $n$-ary relations.},
journal = {Notre Dame J. Formal Logic},
volume = {1},
number = {1-2},
year = {1960},
pages = { 118-121},
language = {en},
url = {http://dml.mathdoc.fr/item/1093956554}
}
Clay, Robert E. The number of moduli in $n$-ary relations.. Notre Dame J. Formal Logic, Tome 1 (1960) no. 1-2, pp. 118-121. http://gdmltest.u-ga.fr/item/1093956554/