Mark McKenney Alejandro Pauly Reasey Praing Markus Schneider Ensuring the Semantic Correctness of Complex Regions. 409-418 2007 conf/er/2007w ER Workshops http://dx.doi.org/10.1007/978-3-540-76292-8_47 db/conf/er/erw2007.html#McKenneyPPS07