Book  (Apr 1993)  Page(s) 555.  
 
Sleepy Polyantha, medium pink, 1955, ('Baldwin'); ('Orange Triumph' x 'Golden Rapture') x Polyantha seedling; deRuiter, Gregory. Description.

Book  (Jun 1992)  Page(s) 242-243.  
 
Mentioned as one of the "7 Dwarfs" series... Balduin ('Sleepy') Polyantha. De Ruiter, 1955. Description.

Book  (1958)  Page(s) 379.  
 
Sleepy (Balduin in Germany). Pol. (de Ruiter; int. Gregory and Willicher Baumschulen, '55.) (Orange Triumph X Golden Rapture) X a Polyantha seedling. Very small, dbl., rhodamine-pink; truss.