under construction
Madhav Nori invented an original approach to mixed motives, in the spirit of Tannakian theory, but based on a specific Nori's Tannakian theorem. Unfortunately his original work, which has been lectured on some summer schools and conferences is not widely available in written form. Maxim Kontsevich based his approach to periods and their appearance in deformation quantization partly on Nori’s insight.
Annette Huber, Stefan Müller-Stach, with contributions of Benjamin Friedrich and Jonas von Wangenheim, Periods and Nori motives, (Book in preparation: first version, September 2015, 323 p. )
Annette Huber, Stefan Müller-Stach, On the relation between Nori motives and Kontsevich periods, 1105.0865
Madhav Nori, TIFR notes on motives, unpublished, pdf
MathOverflow: kontsevichs-conjectures-on-the-grothendieck-teichmuller-group
Alain Bruguieres, On a tannakian result due to Nori, dvi, ps, pdf, djvu
Jonas von Wangenheim, Nori-Motive und Tannaka-Theorie, arxiv/1111.5146
Isamu Iwanari, Tannakization in derived algebraic geometry, arxiv/1112.1761
Joseph Ayoub, Luca Barbieri-Viale, Nori 1-motives (arXiv:1206.5923)
Characterization of the universality of Nori motives via Barr completion of the syntactic category of the theory (in the formal logical sense) of singular cohomology of schemes is in
For more on this topos theory perspective, see
Luca Barbieri-Viale, T-Motives (arXiv:1602.05053)
Olivia Caramello, Motivic toposes (arXiv:1507.06271)