On Hermitian separability of the next-to-leading order BFKL kernel for the adjoint representation of the gauge group in the planar 
SYM
and
Eur. Phys. J. C, 76 5 (2016) 230
Published online: 26 April 2016
DOI: 10.1140/epjc/s10052-016-4046-4