A Hybrid Spatial Model for Representing Indoor Environments. - Bernhard Lorenz; Hans Jürgen Ohlbach; Edgar-Philipp Stoffel (W2GIS, 2006)

Towards a Semantic Spatial Model for Pedestrian Indoor Navigation. - Edgar-Philipp Stoffel; Bernhard Lorenz; Hans Jürgen Ohlbach (ER Workshops, 2007)

L-DSMS - A Local Data Stream Management System. - Christian Hänsel; Hans Jürgen Ohlbach; Edgar-Philipp Stoffel (ECSA, 2008)

Applying hierarchical graphs to pedestrian indoor navigation. - Edgar-Philipp Stoffel; Korbinian Schoder; Hans Jürgen Ohlbach (GIS, 2008)

Hierarchical graphs as organisational principle and spatial model applied to pedestrian indoor navigation. - Edgar-Philipp Stoffel (2009)