@inproceedings{conf/www/StefanoniMK18,
  title = "Estimating the cardinality of conjunctive queries over {RDF} data using graph summarisation",
  author = "Giorgio Stefanoni and Boris Motik and Egor V. Kostylev",
  year = "to appear",
  booktitle = "Proceedings of the 27th Web Conference ({WWW} 2018), Lyon, France, April 23-27, 2018",
}