Reference. Seven Sketches in Compositionality: An Invitation to Applied Category Theory [fong-2018-seven]

2018 · Brendan Fong, David I Spivak
https://arxiv.org/abs/1803.05316 
@misc{fong-2018-seven,
	title = {Seven Sketches in Compositionality: An Invitation to Applied Category Theory},
	author = {Fong, Brendan and Spivak, David I},
	year = {2018},
	eprint = {1803.05316},
	archivePrefix = {arXiv},
	primaryClass = {math.CT},
	url = {https://arxiv.org/abs/1803.05316}
}