Srivastava, Divesh; Ramakrishnan, Raghu; Sudarshan, S. and Praveen Seshadri, "Coral++: Adding Object-Orientation to a Logic Database Language"

[VLDB] (1993) [VLDB] Proceedings of the International Conference on Very Large Databases, 1993.  

Languages mentioned CORAL {1993} Language for deductive database Coral++ {1993} Object-oriented language for deductive databases