Gôppert, H.; Ihringer, J.; Plate, E. J.; Morgenschweis, G. (April 1998). «Flood forecast model for improved reservoir management in the Lenne River catchment, Germany». Hydrological Sciences—Journal—des Sciences Hydrologiques (Pub) 43 (2): 215. doi:10.1080/02626669809492119. CiteSeerX: 10.1.1.408.1817.
Gôppert, H.; Ihringer, J.; Plate, E. J.; Morgenschweis, G. (April 1998). «Flood forecast model for improved reservoir management in the Lenne River catchment, Germany». Hydrological Sciences—Journal—des Sciences Hydrologiques (Pub) 43 (2): 215. doi:10.1080/02626669809492119. CiteSeerX: 10.1.1.408.1817.