Article (magazine)  (2011)  Page(s) 46.  
 
In the later 1930s, a few more varieties came up in the catalogues of Jan Böhm, whose origins we attribute to Geschwind, such as 'Tolstoi' and 'Stratosfera'. But also these last clues got lost with the beginning of World War II

Book  (2007)  
 
'Stratosféra' Hybrid Setigera, deep pink, J. Böhm. Includes description.

Book  (1990)  Page(s) 53.  
 
Stratosféra Centifolia. Böhm 1934... purplish-red...

Book  (1936)  Page(s) 684.  
 
Stratosféra (Northland-Rose) J. Böhm 1934; Geschwind's Nordl. X R. centif.; lilac-pink, large, semi-double, cup-form, solitary or up to 3, once-blooming, growth 7/10, climbing, 2m. Sangerhausen