2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47574A short introduction is given to the method of light-cone sum rules, their theoretical background and main modifications. The discussion is concentrated but not restricted to the applications to heavy quark decays.Plenary talk given at the IVth International Workshop on Progress in Heavy Quark Physics Rostock, Germany, 20--22 September 1997; 15 pages, 4 Postscript figures, uses procsla.sty (included)High Energy Physics - Phenomenologytext