Reference. Set theory for category theory [shulman-2008-set]

@misc{shulman-2008-set,
	title = {Set theory for category theory},
	author = {Shulman, Michael A.},
	year = {2008},
	eprint = {0810.1279},
	archivePrefix = {arXiv},
	primaryClass = {math.CT},
	url = {https://arxiv.org/abs/0810.1279}
}