On algebraic equations satisfied by hypergeometric correlators in WZW   models. II
  We give an explicit description of "bundles of conformal blocks" in Wess-Zumino-Witten models of Conformal field theory and prove that integral representations of Knizhnik-Zamolodchikov equations constructed earlier by the second and third authors are in fact sections of these bundles. 
Boris Feigin, Vadim Schechtman, Alexander Varchenko