Zina M. Ibrahim Ahmed Y. Tawfik Alioune Ngom Surprise-Based Qualitative Probabilistic Networks. 228-239 2009 ECSQARU http://dx.doi.org/10.1007/978-3-642-02906-6_21 conf/ecsqaru/2009 db/conf/ecsqaru/ecsqaru2009.html#IbrahimTN09