%0 Journal Article %A Hartfiel, D. J. %A Maxson, C. J. %T Constructing the maximal monoids in the semigroups $\mathcal {N}_n, \mathcal {S}_n$, and $\Omega _n$ %J Compositio Mathematica %D 1976 %P 41-52 %V 32 %N 1 %I Noordhoff International Publishing %U http://www.numdam.org/item/CM_1976__32_1_41_0/ %G en %F CM_1976__32_1_41_0