1. V.A. Abramovsky, V.N. Gribov, O.V. Kancheli, Yad. Fiz. 18, 595 (1973) [Sov. J. Nucl. Phys. 18, 308 (1974)]
2. L.N. Lipatov, Sov. J. Nucl. Phys. 23, 338 (1976) [Yad. Fiz. 23, 642 (1976)]; E.A. Kuraev, L.N. Lipatov, V.S. Fadin, Sov. Phys. JETP 45, 199 (1977) [Zh. Eksp. Teor. Fiz. 72, 377 (1977)]; I.I. Balitsky, L.N. Lipatov, Sov. J. Nucl. Phys. 28, 822 (1978) [Yad. Fiz. 28, 1597 (1978)]
3. T. Sjostrand, P.Z. Skands, JHEP 0403, 053 (2004) [hep-ph/0402078]; Eur. Phys. J. C 39, 129 (2005) [hep-ph/0408302]
4. M.A. Braun, Phys. Lett. B 483, 105 (2000) [hep-ph/0003003]
5. Y.V. Kovchegov, E. Levin, Nucl. Phys. B 577, 221 (2000) [hep-ph/9911523]