@inproceedings{AMW-2017-certain-answers,
  author    = {Marcelo Arenas and
               Elena Botoeva and
               Egor V. Kostylev and
               Vladislav Ryzhikov},
  title     = {A Note on Computing Certain Answers to Queries over Incomplete Databases},
  booktitle = {Proc. of the 11th Alberto Mendelzon Int. Workshop on
               Foundations of Data Management and the Web (AMW 2017)},
  year      = {2017},
  webpdf = {https://www.doc.ic.ac.uk/~ebotoeva/papers/abkr-AMW-17.pdf},
}