2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/42660Methods of calculation of loop diagrams in Heavy Quark Effective Theory (HQET) are presented.17 pages, 13 figures. Lectures at Int. School on Heavy Quark Physics, Dubna, 27 May - 5 June 2002High Energy Physics - Phenomenologytext