Markus Müller-Olm Helmut Seidl Upper Adjoints for Fast Inter-procedural Variable Equalities. 178-192 2008 ESOP http://dx.doi.org/10.1007/978-3-540-78739-6_15 conf/esop/2008 db/conf/esop/esop2008.html#Muller-OlmS08