@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/