2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45578We report briefly on a broad and systematic study of possible manifestations of QCD-instantons at HERA. We concentrate on the high multiplicity final state structure, reminiscent of an isotropically decaying ``fireball''. First results of a Monte Carlo simulation are presented, with emphasis on the typical event-structure and the transverse energy, muon and $K^0$ flows.10 pages, latex, epsfig, 9 uuencoded figuresHigh Energy Physics - Phenomenologytext