1. [AM69] Artin, Michael; Mazur, Barry Étale homotopy, Lecture Notes in Mathematics, Volume 100, Springer, 1969
2. [BR07] Beligiannis, Apostolos; Reiten, Idun Homological and homotopical aspects of torsion theories, Memoirs of the American Mathematical Society, Volume 883, American Mathematical Society, 2007
3. [Bri09] Brion, Michel Anti-affine algebraic groups, J. Algebra, Volume 321 (2009) no. 3, pp. 934-952
4. [Bri15] Brion, Michel On extensions of algebraic groups with finite quotient, Pac. J. Math., Volume 279 (2015) no. 1-2, pp. 135-153
5. [Bri17] Brion, Michel Commutative algebraic groups up to isogeny, Doc. Math., Volume 22 (2017), pp. 679-725