@inproceedings{DBLP:conf/foiks/EiterLW00, title = "Extension of the Relational Algebra to Probabilistic Complex Values", author = "Thomas Eiter and Thomas Lukasiewicz and Michael Walter", year = "2000", booktitle = "Proceedings of the 1st International Symposium on the Foundations of Information and Knowledge Systems, FoIKS 2000, Burg, Germany, February 14-17, 2000", editor = "Klaus-Dieter Schewe and Bernhard Thalheim", isbn = "3-540-67100-5", pages = "94-115", publisher = "Springer", series = "Lecture Notes in Computer Science", url = "http://dx.doi.org/10.1007/3-540-46564-2_7", volume = "1762", }