David De Weerdt Rani Pinchuk Richard Aked Juan-Jose de Orus Bernard Fontaine TopiMaker - An Implementation of a Novel Topic Maps Visualization. 32-43 2006 conf/tmra/2006 TMRA http://dx.doi.org/10.1007/978-3-540-71945-8_4 db/conf/tmra/tmra2006.html#WeerdtPAOF06