2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48635Introductory talk at the Session on Correlations and Fluctuations of the XXVII International Symposium on Multiparticle Dynamics held in Delphi, Greece, from 6th till 11th of September 1998.14 pagesHigh Energy Physics - Phenomenologytext