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Ylitalo, Teppo (5 June 2012). "Ernst Saari (1882–1918)" (in Finnish). HELEMI – Lapuan historiallinen tietokanta. Archived from the original on 18 September 2020. Retrieved 17 December 2016.
"Viljamaa, Kalle Albinus" (in Finnish). War Victims of Finland 1914–1922 Database. Archived from the original on 18 October 2019. Retrieved 17 December 2016.