
Publications
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1985. Symbolic Semantics and Program Reduction. IEEE Trans. Software Eng.. 11:784-794.
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1987. Intensional Negation of Logic Programs: Examples and Implementation Techniques. TAPSOFT, Vol.2. :96-110.
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1987. Symbolic Evaluation with Structural Recursive Symbolic Constants. Sci. Comput. Program.. 9:161-177.
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1988. A Progress Report on the LML Project. FGCS. :675-684.
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1990. Algebraic Properties of a Class of Logic Programs. NACLP. :23-39.
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1990. Logic Programming within a Functional Framework. PLILP. :372-386.
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1990. A Transformational Approach to Negation in Logic Programming. J. Log. Program.. 8:201-228.
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1990. Universal Quantification by Case Analysis. ECAI. :111-116.
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1991. Theory Construction in Computational Logic. ICLP Workshop on Construction of Logic Programs. :241-250.
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1992. Meta for Modularising Logic Programming. META. :105-119.
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1992. The Type System of LML. Types in Logic Programming. :313-332.
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1994. Amalgamating Language and Meta-language for Composing Logic Programs. GULP-PRODE (2). :408-422.
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1994. Implementations of Program Composition Operations. PLILP. :292-307.
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1994. Implementations of Program Composition Operations. PLILP. :292-307.
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1994. Modular Logic Programming. ACM Trans. Program. Lang. Syst.. 16:1361-1398.
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1994. Implementations of Program Composition Operations. :292–307.
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1995. An Operator for Composing Deductive Databases with Theories of Constraints. LPNMR. :57-70.
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1996. Language Extensions for Semantic Integration of Deductive Databases. Logic in Databases. :415-434.
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1996. Towards Declarative GIS Analysis. ACM-GIS. :98-104.
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1996. Using Temporary Integrity Constraints to Optimize Databases. FAPR. :430-435.
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1997. Applying Restriction Constraint to Deductive Databases. Annals of Mathematics and Artificial Intelligence. :3–25.
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1997. Applying Restriction Constraints to Deductive Databases. Ann. Math. Artif. Intell.. 19:3-25.
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1998. The Constraint Operator of MedLan: Its Efficient Implementation and Use. IICIS. :41-55.
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1999. Beyond Current Technology: The Perspective of Three EC GIS Projects. DEXA Workshop. :510.
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1999. Dynamic composition of parameterised logic modules. Comput. Lang.. 25:211-242.

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