Book  (Apr 1993)  Page(s) 158.  
 
Else's Rival Floribunda, carmine red [mr], 1938, ('Double Else Poulsen'); 'Else Poulsen' sport; Boer Bros... healthier growth.

Article (misc)  (1954)  Page(s) 44.  
 
Else's Rival. 21 chromosomes.

Book  (1941)  Page(s) 113.  
 
Mr. Frank Mason, New Zealand Rose
Elsie's Rival will have to be rigorously rouged before all the plants come true. At the present time they are running about fifty-fifty.

Website/Catalog  (1941)  Page(s) 36.  
 
The very newest roses...
Else's Rival. Valuable Hybrid Polyantha, sport of 'Else Poulsen', full blooms of intense pink. Extraordinarily floriferous, vigorous and healthy. Very effectful bedding and group rose m, also excellent for cutting ....Low garden plants 1 piece RM [Reichsmark] 1.50  10 pieces RM 13.50

Book  (1940)  Page(s) 114.  
 
Mr. Allen A. Brundrett.  The New Importations of 1940
Else's Rival (Ellerbrock, Holland) is a double Else Poulsen, having 15-30 petals (the older variety having 8-10). The colour is deeper and the buds are pointed and nicely formed. In all other respects identical with Else Poulsen.