2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40307We present the perturbative (PT) and non-perturbative (NP) analysis of the cumulative out-of-event-plane momentum distribution in e+e- annihilation in the near-to-planar three-jet region. A physical interpretation based on simple QCD considerations and kinematical relations will be given, with the aim of extending the described techniques to other multi-jet processes and, possibly, to hadron-hadron collisions.6 pages, 2 figures, talk given by G.Z. at the ISMD 2000 Conference, to be published by the World Scientific Publishing Company, SingaporeHigh Energy Physics - Phenomenologytext