2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42195We review briefly some of the successes of Schwinger-Dyson (SD) approach to the physics of quarks and hadrons, primarily light pseudoscalar mesons including eta and eta'. The main purpose of this paper is to point out that SD results on eta and eta' mesons can be formulated and given also in the two-mixing-angle scheme.Talk at 18th European Conference on Few-Body Problems in Physics, 8-14 Sep. 2002, Bled, Slovenia. Submitted to Few Body Syst. Suppl., uses their LaTeX style, 4 pagesHigh Energy Physics - PhenomenologyNuclear Theorytext