@article {MR2104773,
	title = {On semigroups whose idempotent-generated subsemigroup is aperiodic},
	journal = {Internat. J. Algebra Comput.},
	volume = {14},
	number = {5-6},
	year = {2004},
	note = {International Conference on Semigroups and Groups in honor of the 65th birthday of Prof. John Rhodes},
	pages = {655{\textendash}665},
	issn = {0218-1967},
	doi = {10.1142/S021819670400202X},
	url = {http://dx.doi.org/10.1142/S021819670400202X},
	author = {Delgado, Manuel and Fernandes, V{\'{\i}}tor H. and Margolis, Stuart and Steinberg, Benjamin}
}
