@article {MR4068287,
	title = {Optimal bounds for single-source Kolmogorov extractors},
	journal = {Trans. Amer. Math. Soc.},
	volume = {373},
	number = {3},
	year = {2020},
	pages = {1983{\textendash}2006},
	issn = {0002-9947},
	doi = {10.1090/tran/7972},
	url = {https://doi-org.proxy.lib.uwaterloo.ca/10.1090/tran/7972},
	author = {Bienvenu, Laurent and Csima, Barbara F. and Harrison-Trainor, Matthew}
}