A relational data base management system. - Giampio Bracchi; A. Fedeli; Paolo Paolini (ACM Annual Conference (2), 1972)

A Multilevel Relational Model for Data Base Management Systems. - Giampio Bracchi; A. Fedeli; Paolo Paolini (IFIP Working Conference Data Base Management, 1974)

Onwalpha-compactness. - A. Fedeli; Jan Reiterman; Anna Tozzi (Discret. Math., 1992)