2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39833The solution of the equations for the generating functions of multiplicity distributions of quark and gluon jets in higher order 3NLO perturbative QCD is obtained. The non-perturbative effects are discussed as well. The results are compared to recent experimental data on mean multiplicities, their ratio and its slope, higher moments of the distributions.6 pages, LATEX, no Figs; talk given at 4th Rencontres du VietnamHigh Energy Physics - Phenomenologytext