Liukkonen, Petri. "Selma Lagerlöf". Books and Writers (kirjasto.sci.fi). Finland: Kuusankoski Public Library. Archived from the original on 26 January 2015.
Liukkonen, Petri. "Selma Lagerlöf". Books and Writers (kirjasto.sci.fi). Finland: Kuusankoski Public Library. Archived from the original on 26 January 2015.