| 2006 | ||
|---|---|---|
| 2 | EE | Stefan Hansen, Kai-Florian Richter, Alexander Klippel: Landmarks in OpenLS - A Data Structure for Cognitive Ergonomic Route Directions. GIScience 2006: 128-144 |
| 2005 | ||
| 1 | EE | Alexander Klippel, Kai-Florian Richter, Stefan Hansen: Wayfinding Choreme Maps. VISUAL 2005: 94-108 |
| 1 | Alexander Klippel | [1] [2] |
| 2 | Kai-Florian Richter | [1] [2] |