1. L. N. Lipatov, Sov. J. Nucl. Phys. 23, 338 (1976); V. S. Fadin et al., Phys. Lett. B 60, 50 (1975); E. A. Kuraev et al., Sov. Phys. JETP 44, 443 (1976); Sov. Phys. JETP 45, 199 (1977); I. I. Balitsky and L. N. Lipatov, Sov. J. Nucl. Phys. 28, 822 (1978); JETP Lett. 30, 355 (1979).
2. V. N. Gribov and L.N. Lipatov, Sov. J. Nucl. Phys. 15, 438, 675 (1972); L. N. Lipatov, Sov. J. Nucl. Phys. 20, 94 (1975); G. Altarelli and G. Parisi, Nucl. Phys. B 126, 298 (1977); Yu. L. Dokshitzer, Sov. Phys. JETP 46, 641 (1977).
3. L. Brink et al., Nucl. Phys. B 121, 77 (1977); F. Gliozzi et al., Nucl. Phys. B 122, 253 (1977).
4. A. V. Kotikov and L. N. Lipatov, Nucl. Phys. B 661, 19 (2003); in Proceedings of the 35th Winter School, Repino, St.-Petersburg, 2001; hep-ph/0112346.
5. S. Moch et al., Nucl. Phys. B 688, 101 (2004); A. Vogt et al., Nucl. Phys. B 691, 129 (2004).