Ka. Milton et Il. Solovtsov, Can the QCD effective charge be symmetrical in the Euclidean and Minkowskian regions? art. no. 107701., PHYS REV D, 5910(10), 1999, pp. 7701
We study a possible symmetrical behavior of the effective charges defined i
n the Euclidean and Minkowskian regions and prove that such symmetry is inc
onsistent with general principles of the theory. [S0556-2821(99)04610-X].