1. J. H. Schwarz, Phys. Rep.,89, 223 (1982).
2. G. V. Efimov, Nonlocal Interactions [in Russian], Nauka, Moscow (1977).
3. N. V. Krasnikov, ??5 anomalies in nonlocal gauge theories,? Preprint HU-TET 85-26, University of Helsinki, Helsinki (1985).
4. J. Schwinger, Phys. Rev.,128, 2525 (1985).
5. S. L. Adler, Phys. Rev.,177, 2426 (1969).