@article{SF_1989__39_2_134982,
     author = {H.T. Murof},
     title = {On an application of the work of {D.E.} {Knuth} to semigroups.},
     journal = {Semigroup forum},
     pages = {117--124},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1989},
     zbl = {0653.00023},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__39_2_134982/}
}