1. V. N. Popov and T. T. Wu,Phys. Lett. B,85, 395 (1979).
2. V. N. Popov,Functional Integrals in Quantum Field Theory and Statistical Physics [in Russian], Atomizdat, Moscow (1976).
3. L. Ts. Adzhemyan, A. N. Vasil'ev, and Yu. M. Pis'mak,Teor. Mat. Fiz.,68, 323 (1986).
4. L. Ts. Adzhemyan, A. N. Vasil'ev, M. M. Perekalin, and Kh. Yu. Reittu,Zh. Eksp. Teor. Fiz.,96, 1278 (1989).
5. J. C. Collins,Renormalization, C. U. P., Cambridge (1986).