1. V.N. Gribov, L.N. Lipatov, Sov. J. Nucl. Phys. 15, 438 (1972)
2. G. Altarelli, G. Parisi, Nucl. Phys. B 126, 298 (1977)
3. Y.L. Dokshitzer, Sov. Phys. JETP 46, 641 (1977)
4. M. Klein, Ann. Phys. 528, 138 (2016)
5. P. Kostka et al., Pos DIS2013, 256 (2013)