Mohamed Rouane Hacene Yannick Toussaint Petko Valtchev Mining Safety Signals in Spontaneous Reports Database Using Concept Analysis. 285-294 2009 AIME http://dx.doi.org/10.1007/978-3-642-02976-9_41 conf/aime/2009 db/conf/aime/aime2009.html#HaceneTV09