Geographical distribution and epidemiological characteristics of visceral leishmaniasis in Bulgaria, 1988 to 2012 Harizanov, R and Rainova, I and Tzvetkova, N and Kaftandjiev, I and Bikov, I and Mikov, O, Eurosurveillance, 18, 20531 (2013), https://doi.org/10.2807/1560-7917.ES2013.18.28.20531