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. 43 (2): 215. CiteSeerX10.1.1.408.1817. doi:10.1080/02626669809492119.
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. 43 (2): 215. CiteSeerX10.1.1.408.1817. doi:10.1080/02626669809492119.