Logarithmic Behaviours in the Feigin-Fuchs Construction of the c=-2   Conformal Field Theory
  We obtain logarithmic behaviours of a four-point correlation function in the c=-2 conformal field theory by using the Feigin-Fuchs construction. It becomes an indeterminate form by a naive evaluation, but is obtained by introducing an appropriate regularization procedure. 
Hiroki Hata and Shun-ichi Yamaguchi