Book  (2021)  Page(s) 553.  Includes photo(s).
 
Translation:
'Valdemarvik' .....Origin of the variety unknown, possibly from abroad. ...Name given of the discovery lovcation. Known in swedish culture at least since the 1910s. ....repeats regularly in autumn, a property that the variety has alone in the among the Spinosissima-group of the National Genbank.