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Kontchakov, Roman and Zakharyaschev, Michael (2014) An introduction to description logics and query rewriting. In: Koubarakis, M. and Stamou, G. and Stoilos, G. and Horrocks, I. and Kolaitis, P. and Lausen, G. and Weikum, G. (eds.) Reasoning Web. Reasoning and the Web in the Big Data Era. Lecture Notes in Computer Science 8714. Berlin, Germany: Springer, pp. 195-244. ISBN 9783319105864.
Hidders, Jan and Michiels, P. (2003) Avoiding unnecessary ordering operations in xpath. In: Lausen, G. and Suciu, D. (eds.) Database Programming Languages: 9th International Workshop. Lecture Notes in Computer Science 2921. Springer, pp. 54-70. ISBN 9783540208969.
Hidders, Jan (2003) Satisfiability of xpath expressions. In: Lausen, G. and Suciu, D. (eds.) Database Programming Languages: 9th International Workshop. Lecture Notes in Computer Science 2921. Springer, pp. 21-36. ISBN 9783540208969.