Knowlege- Based Image Classification. - Hans Middelkoop; Lucas L. F. Janssen (Konzeption und Einsatz von Umweltinformationssystemen, 1990)

Terrain objects, their dynamics and their monitoring by the integration of GIS and remote sensing. - Lucas L. F. Janssen; Martien Molenaar (IEEE Trans. Geosci. Remote. Sens., 1995)