2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39300The summary of the results of our next-to-next-to-leading fits of Tevatron experimental data for $xF_3$ structure function of the $νN$ deep-inelastic scattering is given. The special attention is paid to the extraction of twist-4 contributions and demonstration of the interplay between these effects and higher-order perturbative QCD corrections. The factorization and renormalization scale uncertainties of the results obtained are analysedLaTeX 9 pages +2 ps figures, Contributed to the Proceedings of Bogolyubov Conference "Problems of Theoretical and Mathematical Physics", Moscow-Dubna-Kyiv, 27 September - 6 October 1999High Energy Physics - Phenomenologytext