@article{GDZPPN00126141X, title = {k-ary monoids of term operations.}, journal = {Semigroup forum}, volume = {44}, year = {1992}, pages = {21-52}, zbl = {0790.08002}, url = {http://dml.mathdoc.fr/item/GDZPPN00126141X} }
Taylor, W.; Hyndman, J.; McKenzie, R. k-ary monoids of term operations.. Semigroup forum, Tome 44 (1992) pp. 21-52. http://gdmltest.u-ga.fr/item/GDZPPN00126141X/