2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/151806It is argued that various kind of shell structure which occurs at specific values of the magnetic field should be observable in small quantum dots in the addition energies and the magnetic susceptibility.4 pages (Latex file) including 4 epsi figures. For enquires see e-mail addresses at the end of the paperMesoscale and Nanoscale Physicstext