Mark McKenney Reasey Praing Markus Schneider 0001 Deriving Topological Relationships Between Simple Regions with Holes. 521-531 2008 SDH http://dx.doi.org/10.1007/978-3-540-68566-1_30 conf/sdh/2008 db/conf/sdh/sdh2008.html#McKenneyPS08