Book  (Jun 1992)  Page(s) 275.  
 
Carmen Sylva Hybrid tea. Heydecker/Dubreuil, 1891. Parentage: 'Baronne Adolphe de Rothschild' x 'Mme Barthélemy Levet'. [Author cites information from different sources.]

Book  (1936)  Page(s) 691.  
 
Sylva, Carmen (HT) Heydecker 1891; Bar. A. de Rothschild X Mme. B. Levet; cream, center carmine-pink, large, double, solitary, floriferous, continuous bllom, autumn bloom, long stems, growth 7/10. Sangerhausen

Magazine  (20 May 1911)  Page(s) 243.  
 
The Parentage of Roses.
The following list of the world's Roses and their parentage has been compiled by Mr. Robert Daniel, 38 Russell Road. Fishponds, Bristol, and by his kind permission we are enabled to publish it...
Carmen Sylva... H.T., Heidecker, 1891, Baroness Rothschild X Mme. Barthelemy Levet

Book  (1899)  Page(s) 31.  
 
Carmen Silva, T, Heydecker, crème et carmin

Magazine  (15 Jan 1892)  Page(s) 14.  
 
Roses Nouvelles. Hybrides de Thé....  Carmen Sylva (Heydecker). Fl. de premier ordre, grande, pleine, érigée, coloris carné crême, centre carmin clair vif.

Magazine  (Apr 1891)  Page(s) 93.  
 
Carmen Sylva. Hybrid Tea. Heydecker.- Bloom flesh-cream-coloured, the centre bright light carmine; large, double, upright habit, solitary. Elongated bud, expands willingly, vigorous plant, continuous and floriferous blooming. Early forcing sort.

Magazine  (1890)  Page(s) 109.  
 
Rosiers Nouveaux 1890-1891.  Rosiers Hybrides de Thé.
Carmen Sylva ( Heydecker) , fleurs grandes , pleines , carné

Magazine  (1890)  Page(s) 383.  
 
Besondere Berichte über die grosse allgemeine Gartenbau-Ausstellung zu Berlin vom 25. April bis 5. Mai 1890....
Ernst Heydecker, Hoflieferant, Frankfurt a. M., hatte ebenfalls eine neue weisse Remontant-Rose 'Carmen Sylva', mit rosa Anflug, ausgestellt. 

Translation:
Special Reports about the Grand General Horticultural Exhibition in Berlin from April 25 to May 5, 1890 ...
Ernst Heydecker, court purveyor, Frankfurt am Main, had also exhibited a new white Hybrid Perpetual, 'Carmen Sylva', with pink shading.

Magazine  (1890)  Page(s) 429.  
 
Rose Carmen Sylva . Ueber diese von Heydecker in Frankfurt a . M. gezüchtete Neuheit ( Thea Hybride ) , welche nach Aussage des Züchters aus einer Kreuzung der „ Madame la Baronne de Rothschild " mit der Thea Madame Barthelémy Levet ...

Translation:
Rose Carmen Sylva. About this novelty (Hybrid Tea), bred by Heydecker in Frankfurt am Main, which according to the statement of the breeder is from a cross of 'Madame la Baronne de Rotschild' and the Tea 'Madame Butterfly' ....