Michael Meskes: Subsumption-Stratified Datalog.J. Log. Program. 36(1): 55-90 (1998)
1997
[b1]
Michael Meskes: Extending the Stratification Approach for Deductive Database Systems.DISDBIS 21, Infix Verlag, St. Augustin, Germany 1997, ISBN 3-89601-421-8