The point-like sources of Euclidean non-Abelian field in instanton liquid

Estimate of average energy of the non-abelian dipole in the instanton medium is calculated. This energy for the dipole in colour singlet state escalates linearly with the separation increasing for the point-like sources unscreened. And its 'tension' coefficient develops the magnitude pretty similar to that from the lattice QCD exploration and other model approaches. The case of arbitrary oriented sources in the colour space are considered in the framework of corresponding perturbation theory