Volume 14, Number 1, March 1991 Special Issue on Unconventional Transaction Management
: Composing Multidatabase Applications using Flexible Transactions.
Volume 14, Number 2, June 1991 Special Issue on Foundations of Object-Oriented Database Systems
: Theoretical Foundations for OODB's - a Personal Perspective.
: A First-Order Formalism of Object-Oriented Languages.
Volume 14, Number 3, September 1991 Special Issue on Multimedia Information Systems