Melanie Herschel. Wondering why data are missing from query results?: ask conseil why-not. In Qi He, Arun Iyengar, Wolfgang Nejdl, Jian Pei, Rajeev Rastogi, editors, 22nd ACM International Conference on Information and Knowledge Management, CIKM'13, San Francisco, CA, USA, October 27 - November 1, 2013. pages 2213-2218, ACM, 2013. [doi]
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