Extending relational algebra to handle bipolarity

Patrick Bosc, Olivier Pivert, Amine Mokhtari, Ludovic Lietard. Extending relational algebra to handle bipolarity. In Sung Y. Shin, Sascha Ossowski, Michael Schumacher, Mathew J. Palakal, Chih-Cheng Hung, editors, Proceedings of the 2010 ACM Symposium on Applied Computing (SAC), Sierre, Switzerland, March 22-26, 2010. pages 1718-1722, ACM, 2010. [doi]

@inproceedings{BoscPML10,
  title = {Extending relational algebra to handle bipolarity},
  author = {Patrick Bosc and Olivier Pivert and Amine Mokhtari and Ludovic Lietard},
  year = {2010},
  doi = {10.1145/1774088.1774456},
  url = {http://doi.acm.org/10.1145/1774088.1774456},
  tags = {relational algebra,  algebra},
  researchr = {https://researchr.org/publication/BoscPML10},
  cites = {0},
  citedby = {0},
  pages = {1718-1722},
  booktitle = {Proceedings of the 2010 ACM Symposium on Applied Computing (SAC), Sierre, Switzerland, March 22-26, 2010},
  editor = {Sung Y. Shin and Sascha Ossowski and Michael Schumacher and Mathew J. Palakal and Chih-Cheng Hung},
  publisher = {ACM},
  isbn = {978-1-60558-639-7},
}