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web.archive.org
"Vaccines against tick-borne encephalitis: WHO position paper"(PDF). Releve epidemiologique hebdomadaire / Section d'hygiene du Secretariat de la Societe des Nations = Weekly epidemiological record / Health Section of the Secretariat of the League of Nations. 86 (24): 241–56. 10 June 2011. PMID21661276. Diarsipkan(PDF) dari versi asli tanggal 22 December 2015.
"Vaccines against tick-borne encephalitis: WHO position paper"(PDF). Releve epidemiologique hebdomadaire / Section d'hygiene du Secretariat de la Societe des Nations = Weekly epidemiological record / Health Section of the Secretariat of the League of Nations. 86 (24): 241–56. 10 June 2011. PMID21661276. Diarsipkan(PDF) dari versi asli tanggal 22 December 2015.