Jaelson Castro Manuel Kolp Lin Liu Anna Perini Dealing with Complexity Using Conceptual Models Based on Tropos. 335-362 2009 Conceptual Modeling: Foundations and Applications http://dx.doi.org/10.1007/978-3-642-02463-4_18 conf/birthday/2009mylopoulos db/conf/birthday/mylopoulos2009.html#CastroKLP09