Kenneth A. Ross. On Negation in HiLog. In Proceedings of the Tenth ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems, May 29-31, 1991, Denver, Colorado. pages 206-215, ACM Press, 1991. [doi]
@inproceedings{Ross91a, title = {On Negation in HiLog}, author = {Kenneth A. Ross}, year = {1991}, doi = {10.1145/113413.113432}, url = {http://doi.acm.org/10.1145/113413.113432}, researchr = {https://researchr.org/publication/Ross91a}, cites = {0}, citedby = {0}, pages = {206-215}, booktitle = {Proceedings of the Tenth ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems, May 29-31, 1991, Denver, Colorado}, publisher = {ACM Press}, isbn = {0-89791-430-9}, }