Meghyn Bienvenu, Stanislav Kikot, Vladimir V. Podolskii. Combined Complexity of Answering Tree-like Queries in OWL 2 QL. In Diego Calvanese, Boris Konev, editors, Proceedings of the 28th International Workshop on Description Logics, Athens,Greece, June 7-10, 2015. Volume 1350 of CEUR Workshop Proceedings, CEUR-WS.org, 2015. [doi]
Abstract is missing.