2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47653We present a review of the Bielefeld-Dubna activities on multiloop calculations.LaTeX, 6 pages, 3 eps-figure, uses axodraw.sty; Contribution to Proceeding of XII International Workshop in Samara (Russia), 4 - 10 September 1997High Energy Physics - Phenomenologytext