vectors of highest weight," Functional. Anal. Appl. 5 (1971) . A. Beilinson and J. Bernstein, "Localisation de g-modules," Comptes Rendus de l'Académie des Sciences, Série I, vol. 292, iss. 1, pp. 15–18, 1981. D. Gaitsgory, Geometric Representation theory, Math 267y, Fall 2005 Ryoshi Hotta, Kiyoshi Takeuchi, Toshiyuki Tanisaki, D-modules, perverse sheaves, and representation theory; translated by Kiyoshi Takeuch N. Jacobson, Lie algebras, Courier Dover Publications, 1979. (elementary treatment for SL(2,C)) Further reading