Nyberg M, Kulonen K, Neuvonen E, Ek-Kommonen C, Nuorgam M, Westerling B. An epidemic of sylvatic rabies in Finland—descriptive epidemiology and results of oral vaccination. Acta Vet Scand. 1992;33(1):43-57

http://www.ncbi.nlm.nih.gov/pubmed?term=An%20epidemic%20of%20sylvatic%20rabies%20in%20Finland--descriptive%20epidemiology%20and%20results%20of%20oral%20vaccination.