P. Barceló, M. Romero, and T. Zeume, ‘A More General Theory of Static Approximations for Conjunctive Queries’, in 21st International Conference on Database Theory (ICDT 2018), 2018, vol. 98, p. 7:1-7:22. https://doi.org/10.4230/LIPIcs.ICDT.2018.7 […]
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