QCD sum rules as a tool for investigation of the baryon properties at finite densities

We analyse the calculations of deep inelastic structure functions of free nucleons by QCD sum rules method,carried out by others.We present our results of calculation of the distribution of valence quarks in nucleon placed into the nuclear matter.We show that the change in distribution has typical EMC shape.We discuss possible application of the method to investigation of other aspects of deep-inelastic processes.We analyse also the limits of possibilities of the approach.