Operator product expansion coefficient functions in terms of composite   operators only. Nonsinglet case
  A new method for calculating the coefficient functions of the operator product expansion is proposed which does not depend explicitly on elementary fields. Coefficient functions are defined entirely in terms of composite operators. The method is illustrated in the case of QCD nonsinglet operators. 
A.V. Kisselev and V.A. Petrov (IHEP, Protvino)