Liukkonen, Petri. "Martti Larni". Books and Writers (kirjasto.sci.fi). Finland: Kuusankoski Public Library. Archived from the original on September 12, 2011.
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Liukkonen, Petri. "Martti Larni". Books and Writers (kirjasto.sci.fi). Finland: Kuusankoski Public Library. Archived from the original on September 12, 2011.