Inger Kristine Karlsen Neil A. M. Maiden Andruid Kerne Inventing Requirements with Creativity Support Tools. 162-174 2009 REFSQ http://dx.doi.org/10.1007/978-3-642-02050-6_14 conf/refsq/2009 db/conf/refsq/refsq2009.html#KarlsenMK09