2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/222848A general pedagogical survey of the basics of the Bethe-Salpeter equation and in particular Wick-Cutkosky model is given in great technical details.64 pages, LaTex, 12 figures now included, problems with postscript fixedHigh Energy Physics - Phenomenologytext