On the application of the effective action approach to amplitudes with reggeon splitting M. A. Braun, S. S. Pozdnyakov, M. Yu. Salykin and M. I. Vyazovsky Eur. Phys. J. C, 74 8 (2014) 2989 Published online: 07 August 2014 DOI: 10.1140/epjc/s10052-014-2989-x