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PhD Thesis, Computer Sciences Department, The University of Texas at Austin, Austin, TX, 2007.

@phdthesis{ferraris:phd07, title={Expressiveness of Answer Set Languages}, author={Paolo Ferraris}, school={Computer Sciences Department, The University of Texas at Austin}, address={Austin, TX}, url="http://www.cs.utexas.edu/users/ai-lab/?ferraris:phd07", year={2007} }