Contribution of matter fields to the Gell-Mann-Low function for N=1   supersymmetric Yang-Mills theory, regularized by higher covariant derivatives
  Contribution of matter fields to the Gell-Mann-Low function for N=1 supersymmetric Yang-Mills theory, regularized by higher covariant derivatives, is obtained using Schwinger-Dyson equations and Slavnov-Tailor identities. A possible deviation of the result from the corresponding contribution in the exact Novikov, Shifman, Vainshtein and Zakharov $\beta$-function is discussed. 
K.V.Stepanyantz