2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45160The recent theoretical progress in the description of semileptonic decays in the framework of the heavy mass expansion is summarized. Both inclusive and exclusive decays are considered.Contribution to the XXIXth Rencontres de Moriond (Electroweak Interactions and Unified Theories}, Meribel, France, March 12-19, 1994, LaTeX, 10 pages, two figues appended after \end{document} as uu-encoded and compressed .eps files, uses epsf., CERN-TH.7264/94High Energy Physics - Phenomenologytext