Stumme, Gerd. "Iceberg Query Lattices for Datalog." Paper presented at the meeting of the Conceptual Structures at Work: 12th International Conference on Conceptual Structures (ICCS 2004), Heidelberg, 2004.

Stumme, Gerd. "Iceberg Query Lattices for Datalog." Paper presented at the meeting of the Conceptual Structures at Work: 12th International Conference on Conceptual Structures (ICCS 2004), Heidelberg, 2004.

Dehaspe, L. and Toivonen, H.. "Discovery of Frequent Datalog Patterns." Data Mining and Knowledge Discovery 3 , no. 1 (1999): 7--36.