Renormalization Group Analysis of Lattice Theories and Improved Lattice   Action. II -- four-dimensional non-abelian SU(N) gauge model
  A new block spin renormalization group transformation for SU(N) gauge models is proposed near the non-trivial fixed point in perturbation theory and thereby the expectation values of various Wilson loops on the renormalized trajectory near the fixed point are explicitly obtained. An improved action is obtained as in a preceding paper and a criterion for the scaling behavior of physical quantities is also given. 
Y. Iwasaki
hep-lat