Leonida Colescu, director of Romanian Statistics Service between 1899–1922, discovered that the number of people was overestimated in the census conducted in 1859–1860 and calculated that the real figure was 3,864,848 people. Leonida Colescu (1944). Analiza rezultatelor recensãmântului general al populatiei României din 1899(PDF). Institutul National de Statistica. p. 7–8; 19.
"Populația rezidentă la 23 martie 2023" [Resident population as of March 23, 2023] (PDF). INS (in Romanian). Institutul Național de Statistică. Retrieved 23 March 2023.
World Population Prospects. The 2010 Revision(PDF) (Report). Vol. I: Comprehensive Tables. Department of Economic and Social Affairs, Population Division, United Nations, New York. 2011. p. 162.