Jean-François Bonnefon Didier Dubois Henri Prade Transitive Observation-Based Causation, Saliency, and the Markov Condition. 78-91 2008 SUM http://dx.doi.org/10.1007/978-3-540-87993-0_8 conf/sum/2008 db/conf/sum/sum2008.html#BonnefonDP08