Book  (2021)  Page(s) 342-343.  Includes photo(s).
 
'Änkans i Listarum' .... known in culture in Sweden from the beginning of the 1900s...in all characteristics of the bloom identical with 'Fjärsmans'....genetically closest to 'Fjärmans' with a similarity index of 94,4%. Other close sorts are 'Hovby', 'Pustebacken' and its sports, 'Bovallens Paulina' and 'Fågelfors' with similarity indices between 70,0 and 58,8%.