Ambrosio, Thomas (2010). "Russia". In Beacháin, Donnacha (ed.). The colour revolutions in the former Soviet republics: successes and failures. Abel Polese. Taylor & Francis. p. 143. ISBN978-0-415-58060-1.
"Citizenship Act". Estonian Ministry of Justice. Archived from the original on 27 September 2007. Retrieved 25 July 2007. (Official translation of the law text)
"Citizenship Act". Estonian Ministry of Justice. Archived from the original on 27 September 2007. Retrieved 25 July 2007. (Official translation of the law text)