Mrs. dr. R. Scheuer-Karpin, Ilona Jaenicke and Andrea Edel. The Story of the German Rex. german-rex.lima-city.de. March 2014 [2023-02-22]. (原始内容存档于2023-02-01).
Mrs. dr. R. Scheuer-Karpin, Ilona Jaenicke and Andrea Edel. The Story of the German Rex. german-rex.lima-city.de. March 2014 [2023-02-22]. (原始内容存档于2023-02-01).