1. D. d’Enterria, J. Phys. G 34, S53 (2007)
2. See e.g. F. Karsch and E. Laermann, arXiv:hep-lat/0305025
3. E. V. Shuryak, Sov. Phys. JETP 47, 212 (1978) [Zh. Eksp. Teor. Fiz. 74, 408 (1978)]; J.C. Collins and M.J. Perry, Phys. Rev. Lett. 34, 1353 (1975); N. Cabibbo and G. Parisi, Phys. Lett. B 59 (1975) 67; B. Freedman and L. McLerran, Phys. Rev. D 16, 1169 (1977)
4. A. Accardi et al., arXiv:hep-ph/0310274
5. V. N. Gribov and L. N. Lipatov, Sov. J. Nucl. Phys. 15, 438 (1972) [Yad. Fiz. 15, 781 (1972)]; G. Altarelli and G. Parisi, Nucl. Phys. B 126, 298 (1977); Y. L. Dokshitzer, Sov. Phys. JETP 46, 641 (1977) [Zh. Eksp. Teor. Fiz. 73, 1216 (1977)]