1. G. Altarelli and G. Parisi, Nucl. Phys. B 126, 298 (1977). https://doi.org/10.1016/0550-3213(77)90384-4
2. V. N. Gribov and L. N. Lipatov, Sov. J. Nucl. Phys 15, 438 (1972);
3. L. N. Lipatov, Sov. J. Nucl. Phys. 20, 95 (1972);
4. Yu. L. Dokshitzer, Sov. Phys. JETP 46, 641 (1977).
5. J. Bartels, B. I. Ermolaev, and M. G. Ryskin, Z. Phys. C: Part. Fields 72, 273 (1996). https://doi.org/10.1007/s002880050285