The 2nd order bootstrap relation is discussed in view of the recent critics by F.Fadin, R.Fiore y A.Papa. It is shown that the strong bootstrap condition and the anzatz to solve it used in our earlier paper are valid at least for the quark part of the next-to-leading contribution.
Cite
@article{arxiv.hep-ph/9901447,
title = {Comments on the 2nd order bootstrap relation},
author = {M. A. Braun},
journal= {arXiv preprint arXiv:hep-ph/9901447},
year = {2007}
}