Riccardi N (22 January 2019). "Tick-borne encephalitis in Europe: a brief update on epidemiology, diagnosis, prevention, and treatment". Eur J Intern Med. 62: 1–6. doi:10.1016/j.ejim.2019.01.004. PMID30678880. S2CID59252822.
"Vaccines against tick-borne encephalitis: WHO position paper". Weekly Epidemiological Record. 86 (24): 241–256. June 2011. hdl:10665/241769. PMID21661276.
Riccardi N (22 January 2019). "Tick-borne encephalitis in Europe: a brief update on epidemiology, diagnosis, prevention, and treatment". Eur J Intern Med. 62: 1–6. doi:10.1016/j.ejim.2019.01.004. PMID30678880. S2CID59252822.
"Vaccines against tick-borne encephalitis: WHO position paper". Weekly Epidemiological Record. 86 (24): 241–256. June 2011. hdl:10665/241769. PMID21661276.
Riccardi N (22 January 2019). "Tick-borne encephalitis in Europe: a brief update on epidemiology, diagnosis, prevention, and treatment". Eur J Intern Med. 62: 1–6. doi:10.1016/j.ejim.2019.01.004. PMID30678880. S2CID59252822.