2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45934Recent work on flavour changing neutral current effects in supersymmetric models is reviewed. The emphasis is put on new issues related to solutions to the flavour problem through new symmetries: GUTs, horizontal symmetries, modular invariances.4 pages, uses wstwocl.sty (included in gzipped tarred package) Invited Talk at the HEP95 Euroconference, Brussels, July 95High Energy Physics - Phenomenologytext