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]
Abstract is missing.