Aden, Mareike (5 September 2013). "Alexej Nawalny: Der dunkle Star" [Alexei Navalny: The Dark Star]. Die Zeit Online (in German). Archived from the original on 15 August 2023. Retrieved 26 October 2020.
Aden, Mareike (5 September 2013). "Alexej Nawalny: Der dunkle Star" [Alexei Navalny: The Dark Star]. Die Zeit Online (in German). Archived from the original on 15 August 2023. Retrieved 26 October 2020.