2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82610Inclusive and semi-inclusive deep inelastic leptoproduction offers possibilities to study details of the quark and gluon structure of the hadrons involved. In many of these experiments polarization is an essential ingredient. We also emphasize the dependence on transverse momenta of the quarks, which leads to azimuthal asymmetries in the produced hadrons.5 pages RevTeX, talk presented at the First ELFE School on Confinement Physics, 22-28 July 1995, Cambridge, EnglandNuclear TheoryHigh Energy Physics - Phenomenologytext