Morten, Boa (16 November 2012). "Ger Senden (1971)". Kent u deze Nog (in Dutch). Archived from the original on 10 December 2023. Retrieved 26 March 2024.
Morten, Boa (16 November 2012). "Ger Senden (1971)". Kent u deze Nog (in Dutch). Archived from the original on 10 December 2023. Retrieved 26 March 2024.