Sándor P. Fekete Alexander Kröller Carsten Buschmann Stefan Fischer Dennis Pfisterer Koordinatenfreies Lokationsbewusstsein (Localization without Coordinates). 70-78 2005 47 it - Information Technology 2 http://dx.doi.org/10.1524/itit.47.2.70.62258 db/journals/it/it47.html#FeketeKBFP05