Jean-François Condotta Souhila Kaci Pierre Marquis Nicolas Schwind Merging Qualitative Constraint Networks Defined on Different Qualitative Formalisms. 106-123 2009 COSIT http://dx.doi.org/10.1007/978-3-642-03832-7_7 conf/cosit/2009 db/conf/cosit/cosit2009.html#CondottaKMS09