2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54065I discuss the construction of the effective action for QCD suitable for the description of high-energy and small momentum transfer diffractive processes.6 pages in LATEX ( Talk given at the "Theory of Hadrons and Light-front QCD" workshop in Zgorzelisko, Poland, 15-25 Aug. 1994 )High Energy Physics - Theorytext