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On the Complexity of Hard Enumeration Problems., , , , and . LATA, volume 10168 of Lecture Notes in Computer Science, page 183-195. (2017)Uncertain Databases in Collaborative Data Management., , , and . MUD, volume WP10-04 of CTIT Workshop Proceedings Series, page 129-143. Centre for Telematics and Information Technology (CTIT), University of Twente, The Netherlands, (2010)The Challenge of Optional Matching in SPARQL., , , , , and . FoIKS, volume 9616 of Lecture Notes in Computer Science, page 169-190. Springer, (2016)On the Hardness of Counting the Solutions of SPARQL Queries., and . AMW, volume 1189 of CEUR Workshop Proceedings, CEUR-WS.org, (2014)On the Complexity of Hard Enumeration Problems, , , , and . (2016)cite arxiv:1610.05493.Characterizing Tractability of Simple Well-Designed Pattern Trees with Projection., and . Theory Comput. Syst., 65 (1): 3-41 (2021)Efficient Evaluation and Approximation of Well-designed Pattern Trees., , and . PODS, page 131-144. ACM, (2015)The complexity of evaluating tuple generating dependencies., and . ICDT, page 244-255. ACM, (2011)DL-Lite and Conjunctive Queries Extended by Optional Matching., , , , and . Description Logics, volume 1350 of CEUR Workshop Proceedings, CEUR-WS.org, (2015)Static analysis and optimization of semantic web queries., , , and . PODS, page 89-100. ACM, (2012)