1. G. Preparata:Phys. Lett. B,102, 327 (1981).
2. Contrary to a widely held opinion, this research program has never questioned the validity of the basic QCD Lagrangian. It only departed from the generally accepted picture of QCD, which pretends that confinement does not play any role at short distances.
3. D. Gross andF. Wilczek:Phys. Rev. Lett.,30, 1342 (1973);H. D. Politzer:Phys. Rev. Lett.,30, 1346 (1973).
4. For a recent review seeG. Preparata:The magnetic instability of the perturbative Yang-Mills vacuum, inVariational Calculations in Quantum Field Theory, edited byL. Polley andD. E. L. Pottinger (World Scientific, Singapore, 1988).
5. An early—and only—criticism byL. Maiani et al.:Nucl. Phys. B,273, 275 (1986), was rebutted inG. Preparata:Nuovo Cimento A,96, 394 (1986) and more recently with different arguments has been dismissed byP. Castorina andM. Consoli:Phys. Lett. B,213, 493 (1988).