#incomplete


References

  1. https://www.damtp.cam.ac.uk/user/tong/string/string4.pdf
  2. Francesco, P., Mathieu, P., & Sénéchal, D. (2012). Conformal field theory. Springer Science & Business Media. ISBN:978-0-387-94785-3. https://doi.org/10.1007/978-1-4612-2256-9