2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82824The main aim of the results presented here is to demonstrate and analyse the importance of shell effects in nuclei, metallic clusters and quantum dots.9 pages, latex Invited talk at the International Conference "Nuclear Structure and Related Topics", Dubna, Russia, September 9-14, 1997Nuclear TheoryCondensed Mattertext