2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/49772The models for soft colour interactions and colour string re-interactions, implemented in the Monte Carlo program LEPTO, are investigated regarding hadronic final states in inclusive and diffractive deep inelastic scattering.12 pages, 8 figures, LaTeX. Contribution to workshop on `Monte Carlo generators for HERA physics', http://www.desy.de/~heramc/High Energy Physics - Phenomenologytext