Book  (2008)  Page(s) 56.  Includes photo(s).
 
Hans Jürgen Evers 'Barkarole ®' (1988) A long-stemmed blackish red Hybrid Tea...Well double blooms develop from elegante black-red buds. The dark green foliage is reddish when young ...vigorous and upright....100 cm.

Book  (2000)  Page(s) 584.  Includes photo(s).
 
‘Taboo’ (TANelorak, syn. ‘Barkarole’, Grand Château’) - Moderne - Buisson à grandes fleurs - Hybride de Thé – rouge foncé, remontant. Description… Evers, Allemagne, 1988.

Book  (1999)  Page(s) 100.  
 
Geoff Swane, NSW. Swane's New Rose Introductions for 1999. 
Taboo  (TANelorak) Hybrid Tea. The buds would suggest that a pure black rose will open from the buds which are of the deepest red, with black edges. The buds open slowly to perfectly formed, richly fragrant blooms of dark, velvet-red. Blooms are prolific and recurrent on a tall upright plant (150cm). A rose to rival 'Oklahoma' for colour and fragrance.

Book  (1999)  Page(s) 122.  
 
Taboo™ Hybrid Tea, dark red, 1993, (TANelorak; 'Barkarole®'; 'Grand Château®'); Seedling x Seedling; Evers, Hans/Rosen Tantau. Description.

Website/Catalog  (28 Dec 1998)  Page(s) 14.  Includes photo(s).
 
Taboo™ (TANelorak) Description... the closest yet to a black rose...

Book  (Dec 1998)  Page(s) 584.  Includes photo(s).
 
Taboo (TANelorak, 'Barkarole', 'Grand Château') Large-flowered/Hybrid Tea. Evers 1988. Description... among the darkest red roses to be found...

Book  (1998)  Page(s) 91.  
 
Taboo™ Hybrid Tea, dark red, 1993, (TANelorak; 'Barkarole®'; 'Grand Château®'); Seedling x Seedling; Evers, Hans/Rosen Tantau. Description.

Book  (May 1992)  Page(s) 375.  
 
Barkarole (Tanelorak) Hybrid Tea. Tantau (Germany) 1989. Description and cultivation... Shapely blooms of very deep red...