Ray, Rahul Algorithms and Complexity, MPI for Informatics, Max Planck Society; International Max Planck Research School, MPI for Informatics, Max Planck Society;
http://scidok.sulb.uni-saarland.de/volltexte/2004/336/ (Any fulltext)
http://scidok.sulb.uni-saarland.de/doku/urheberrecht.php?la=de (Copyright transfer agreement)
Ray, R. (2004). Geometric Algorithms for Object Placement and Planarity in a Terrain. PhD Thesis, Universität des Saarlandes, Saarbrücken. doi:10.22028/D291-23759.