A Functional Model for Macro-Databases.

http://doi.acm.org/10.1145/122050.122051 db/journals/sigmod/RafanelliR91.html Maurizio Rafanelli Fabrizio L. Ricci A Functional Model for Macro-Databases. 3-8 sigmodR/20-1/P003.pdf 1991 20 SIGMOD Record 1 db/journals/sigmod/sigmod20.html#RafanelliR91