Schechtman, Vadim Max Planck Institute for Mathematics, Max Planck Society;
Malikov, Fyodor Max Planck Institute for Mathematics, Max Planck Society;
Schechtman, V., & Malikov, F. (2003). Deformations of vertex algebras, quantum cohomology of toric varieties, and elliptic genus. Communications in Mathematical Physics, 234, 77-100.