Non-linear equation in the re-summed next-to-leading order of perturbative QCD: the leading twist approximationCarlos Contreras, Eugene Levin, Rodrigo Meneses and Michael SanhuezaEur. Phys. J. C, 80 11 (2020) 1029DOI: https://doi.org/10.1140/epjc/s10052-020-08580-w