Gottlob, G., Leone, N., & Scarcello, F. (1999). Hypertree Decompositions and Tractable Queries.
Lua i Stíl Chicago (17ú heag.)Gottlob, G., N. Leone, agus F. Scarcello. Hypertree Decompositions and Tractable Queries. 1999.
Lua MLA (9ú heag.)Gottlob, G., et al. Hypertree Decompositions and Tractable Queries. 1999.
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