An overview of PRIMO: a portable interface between PROLOG and relational databases. - F. Gozzi; Marco Lugli; Stefano Ceri (Inf. Syst., 1990)

MOOD*: An Architecture for Object Oriented Access to a Relational Data Base. - Marco Lugli; Luca Nini; Stefano Ceri (LOGIDATA+: Deductive Databases with Complex Objects, 1993)

A Prototype System for the Efficient Support of Object Oriented Database Applications. - Marco Lugli; Luca Nini; Silvio Salza; Mario Terranova (SEBD, 1994)