@article{SF_1983__26_134599,
     author = {D.C. Trueman},
     title = {Fundamental preorders and partial orders on completely [0] simple  semigroups.},
     journal = {Semigroup forum},
     pages = {139--150},
     publisher = {mathdoc},
     volume = {26},
     year = {1983},
     zbl = {0505.06008},
     url = {http://geodesic.mathdoc.fr/item/SF_1983__26_134599/}
}