@inproceedings{ijcai2017p138, author = {Marco Console and Paolo Guagliardo and Leonid Libkin}, title = {On Querying Incomplete Information in Databases under Bag Semantics}, booktitle = {Proceedings of the Twenty-Sixth International Joint Conference on Artificial Intelligence, {IJCAI-17}}, pages = {993--999}, year = {2017}, doi = {10.24963/ijcai.2017/138}, url = {https://doi.org/10.24963/ijcai.2017/138}, }