Decoupling of the DGLAP evolution equations at next-to-next-to-leading order (NNLO) at low-x G. R. Boroun and B. Rezaei Eur. Phys. J. C, 73 5 (2013) 2412 Published online: 04 May 2013 DOI: 10.1140/epjc/s10052-013-2412-z