@article {MR2158897,
	title = {An elementary proof that every singular matrix is a product of idempotent matrices},
	journal = {Amer. Math. Monthly},
	volume = {112},
	number = {7},
	year = {2005},
	note = {n/a},
	pages = {641{\textendash}645},
	abstract = {n/a},
	issn = {0002-9890},
	doi = {10.2307/30037549},
	url = {https://doi.org/10.2307/30037549},
	author = {J. Ara{\'u}jo and Mitchell, J. D.}
}
