Book  (2009)  Page(s) 116.  
 
Thomas Proll. Kordes Roses of the Future.
Ground Cover. 'Medeo'. Synonym 'Grouse 2000' KORtraste. Awards: ADR 2001. Certificate of Merit in Adelaide 2007.
[The synonym 'Grouse 2000' for 'Medeo' is an error]

Book  (Dec 1998)  Page(s) 287.  
 
Grouse 2000 (KORteilhab) Modern Shrub. Kordes (Germany) 1998. Parentage Unknown... small, flat, fragrant flowers that are blush white and single, and show prominent yellow stamens...

[Note - this reference deleted from the 1999 edition]