Kun Yue Weiyi Liu Xiaoling Wang Aoying Zhou Jin Li Discovering semantic associations among Web services based on the qualitative probabilistic network. 9082-9094 2009 36 Expert Syst. Appl. 5 http://dx.doi.org/10.1016/j.eswa.2008.12.044 db/journals/eswa/eswa36.html#YueLWZL09