« Bulgarie : plus fort déclin démographique depuis la chute du communisme », Ouest France, (lire en ligne)
researchgate.net
(bg + en) L. Ivanov. Demographic priorities and goals of the Government Program 2017–2021. Presentation at the round table Demographic Policies and Labour Mobility organized by the Ministry of Labour and Social Policy, and the State Agency for the Bulgarians Abroad. Sofia, 19 September 2017. 4 pp.