The Integration of the Network and Relational Approaches in a DBMS.

V. D'Appollonio Alfonso Fuggetta P. Lazzarini Mauro Negri Giuseppe Pelagatti The Integration of the Network and Relational Approaches in a DBMS. 177-197 1985 BNCOD db/conf/bncod/bncod85.html#DAppollonioFLNP85