1. Vacuum polarization by a source-free gauge field;Batalin;Sov. J. Nucl. Phys.,1977
2. Infrared instability of the vacuum state of gauge theories and asymptotic freedom;Savvidy;Phys. Lett. B,1977
3. Vacuum polarization induced by the intense gauge field;Matinyan;Nucl. Phys. B,1978
4. Vacuum Polarisation by Intensive Gauge Fields;Savvidy,1977
5. Computation of the quantum effects due to a four-dimensional pseudoparticle;'t Hooft;Phys. Rev. D,1976