Links to related stuff in Stacks project:

1. Monoidal Categories
2. Additive Monoidal Categories
3. Groupoid schemes
4. More on Groupoid Schemes
5. Galois categories

Directory listing:

1. Deligne-Milne-Tannakian-Categories.pdf
2. files/
3. Jose-Semintal-Notes-on-Tannakian-Categories.pdf
4. Saavedra-Categories-Tannakiennes.pdf
5. Rosenberg-The-Existence-of-Fibre-Functors.pdf
6. Duong-Hai-Tannakian-Dedekind.pdf
7. Deligne-Categories-tannakiennes.pdf
8. Wedhorn-Tannakian-over-valuation-rings.pdf
9. 1972_Book_CatégoriesTannakiennes.pdf