Book  (21 Feb 2010)  
 
'Troika, Climbing'. Cl HT, ob, Thomas, Dr. A.S. Introductions: Rumsey

Book  (1980)  Page(s) 523.  
 
‘Troika Climbing Cl. HT. (A. S. Thomas; int. Rumsey, ’64)

Book  (1975)  Page(s) 110.  
 
Dr. A. S. Thomas. Some of the New Ones. ‘Troika’. HT. (Poulsen, 1971). …. One of my plants has thrown a climbing sport which appears not be to remontant.

Book  (1974)  Page(s) 31.  
 
p31. Dr. A. S. Thomas. New Rose Registrations. ‘Clg. Troika’. Clg. HT. Raised by A. S. Thomas. Year of Registration 1973.

p68. Dr. A. S. Thomas. Roses Overseas, 1973.
'Troika' HT (Poulsen, 1972). Formerly 'Royal Dane' and sold under that name in Australia in 1972 and 1973. It was still not on sale in Britain in July, 1973, but it was regarded as a very fine rose. I planted it in June, 1972, and have not been impressed with it except for its burnt orange and gold colouring. It gave a climbing mutation and no autumn blooms in my garden.