Jianbing Ma Weiru Liu Anthony Hunter The Non-archimedean Polynomials and Merging of Stratified Knowledge Bases. 408-420 2009 ECSQARU http://dx.doi.org/10.1007/978-3-642-02906-6_36 conf/ecsqaru/2009 db/conf/ecsqaru/ecsqaru2009.html#MaLH09