Object-oriented databases.

Fundamentals of object databases : object-oriented and object-relational design by: Urban, Susan; Dietrich, Suzanne Wagner (Language materials, printed)

Object-oriented database system = concepts and architectures by: Elisa Bertino; Martino, Lorenzo (Language materials, printed)

Object-oriented technology : a manager's guide by: Taylor, David A. (Language materials, printed)

Object-oriented methods by: Graham, Ian (Language materials, printed)

Distributed Object-oriented data-systems design by: Gretzinger, Michael R.; Prabhat K. Andleigh (Language materials, printed)