Article (magazine)  (Jan 1955)  Page(s) 20.  
 
In crimson to maroon, (Class V) , 'Koi-kagura,' 'Kasane-jishi,' and 'Konron-koku,' 'Hatsu-garashu,' 'Sumi-noichi,' and 'Kokko'.

Article (magazine)  (Jan 1955)  Page(s) 58.  
 
Alphabetical Check List of Tree Peony Names In  Public Collections And/or Available in Nurseries 1954-1955
Japanese, Crimson, 'Koi-kagura' (Sacred Love Music) (Jap. bef. 1926), [Gardens] Scott Foundation