| |
| 2008 | ||
|---|---|---|
| 4 | EE | Markus Lupp: deegree Free Software. Encyclopedia of GIS 2008: 235-239 |
| 3 | EE | Markus Lupp: Extensible Markup Language. Encyclopedia of GIS 2008: 307 |
| 2 | EE | Markus Lupp: OGC Web Services. Encyclopedia of GIS 2008: 799-800 |
| 1 | EE | Markus Lupp: Open Geospatial Consortium. Encyclopedia of GIS 2008: 815 |