1. S. Arkhipov, R. Bezrukavnikov, V. Ginzburg, Quantum groups, the loop Grassmannian, and the Springer resolution, J. Amer. Math. Soc. 17 (2004), 595–678.
2. E. Akyildiz, J. Carrell, Cohomology of projective varieties with regular SL2 -actions, Manuscripta Math. 58 (1987), 473–486.
3. A. Beilinson, J. Bernstein, P. Deligne, Faisceaux pervers, Astérisque 100 (1982).
4. W. Borho, J.-L. Brylinski, R. MacPherson, Nilpotent Orbits, Primitive Ideals, and Characteristic Classes, Progress in Mathematics, Vol. 78, Birkhäser Boston, Boston, MA, 1989.
5. A. Beilinson, V. Drinfeld, Quantization of Hitchin’s integrable system and Hecke eigensheaves, available at http://www.math.uchicago.edu/~mitya/langlands .