2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37705We summarise the latest experimental QCD studies based on data from LEP. Measurements of the quark and gluon jet fragmentation functions are discussed, including a new algorithm to infer the properties of unbiased gluon jets. We describe a new test for destructive interference in the radiation of soft gluons from a three-parton system. Finally, we report the latest combined value of the strong coupling, measured using event shape observables.8 pages, 6 figures, LaTeX2e. To appear in the proceedings of the XXXIX Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 21-28 March 2004High Energy Physics - Experimenttext