Evolution of shower parton distributions in a jet from quark   recombination model
  The evolution of shower parton distributions in a jet is investigated in the framework of quark recombination model. The distributions are parameterized and the $Q^2$ dependence of the parameters is given by polynomials of $\ln Q^2$ for a wide range of $Q^2$. 
Z.G. Tan and C.B. Yang