@article{SF_1984__29_134685,
     author = {D. Easdown},
     title = {Biordered sets of bands.},
     journal = {Semigroup forum},
     pages = {241--246},
     year = {1984},
     volume = {29},
     zbl = {0543.20043},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__29_134685/}
}