Fei Guo Jianmin Wang Zhihao Zhang Xiaojun Ye Deyi Li An Improved Algorithm to Watermark Numeric Relational Data. 138-149 2005 conf/wisa/2005 WISA http://dx.doi.org/10.1007/11604938_11 db/conf/wisa/wisa2005.html#GuoWZYL05