reference. An introduction to categories and sheaves [schapira2023introduction]

✍️source

@misc{schapira2023introduction,
 title = {An Introduction to Categories and Sheaves},
 author = {Schapira, Pierre},
 year = {2023},
 url = {https://webusers.imj-prg.fr/~pierre.schapira/LectNotes/CatShv.pdf}
}