Large outbreak of acute gastroenteritis in Samokov Region, Bulgaria, February 2007
Kamenov, G and Borissova, M and Kovachka, K and Korsun, N and Mladenova, Z and Tiholova, M, Weekly releases (1997–2007), 12, 3196 (2007), https://doi.org/10.2807/esw.12.20.03196-en