@article {MR1884612,
	title = {Normal semigroups of endomorphisms of proper independence algebras are idempotent generated},
	journal = {Proc. Edinb. Math. Soc. (2)},
	volume = {45},
	number = {1},
	year = {2002},
	note = {n/a},
	pages = {205{\textendash}217},
	abstract = {n/a},
	issn = {0013-0915},
	doi = {10.1017/S0013091500001140},
	url = {https://doi.org/10.1017/S0013091500001140},
	author = {Ara{\'u}jo, Jo{\~a}o}
}
