If-Then and If-Then-Unless Rules in the Semantic Web.

Xing Wang Z. M. Ma Li Yan Jingwei Cheng If-Then and If-Then-Unless Rules in the Semantic Web. 357-360 2009 Web Intelligence http://dx.doi.org/10.1109/WI-IAT.2009.62 conf/webi/2009 db/conf/webi/webi2009.html#WangMYC09