"Geschichte der Namensvergabe" [History of Naming Weather Systems]. The Free University of Berlin's Institute of Meteorology. January 2000. Archived from the original on 7 December 2013. Retrieved 17 August 2014.
"History of Naming Weather Systems". The Free University of Berlin's Institute of Meteorology. January 2000. Archived from the original on 29 November 2014. Retrieved 17 August 2014.
"Geschichte der Namensvergabe" [History of Naming Weather Systems]. The Free University of Berlin's Institute of Meteorology. January 2000. Archived from the original on 7 December 2013. Retrieved 17 August 2014.
"History of Naming Weather Systems". The Free University of Berlin's Institute of Meteorology. January 2000. Archived from the original on 29 November 2014. Retrieved 17 August 2014.