1. Diskrete räume;Alexandroff;Mat. Sb. NS,1937
2. Algebraic Topology of Finite Topological Spaces and Applications;Barmak,2011
3. Implementation of relation algebra using binary decision diagrams;Berghammer,2002
4. RelView – an OBDD-based computer algebra system for relations;Berghammer,2005
5. Applying relation algebra and RelView to solve problems on orders and lattices;Berghammer;Acta Inform.,2008