"Algebraic Curves, Twisted Vertex Operators, and Prym Varieties", Berkeley 2002 PS
"Wakimoto Modules for Twisted Affine Algebras", MRL 2002 PDF
"Twisted Modules Over Vertex Algebras on Algebraic Curves ", with Edward Frenkel, Advances in Mathematics 2004 PDF
"Chiral de Rham complex and orbifolds", with Edward Frenkel PDF
"Orbifold conformal blocks and the stack of pointed G-covers", to appear in the Journal of Geometry and Physics PDF
"Discrete torsion, orbifold elliptic genera, and the chiral de Rham complex", with Anatoly Libgober PDF
"A first glimpse at the minimal model program", with Charles Cadman, Izzet Coskun, Kelly Jabbusch, Michael Joyce, Sandor Kovacs, Max D. Lieblich, Fumitoshi Sato, and Jing Zhang.
Notes from a Princeton workshop, Geometric Langlands and Physics