"Nikolas Klosterhalfen". leichtathletik-datenbank.de. Archived from the original on 12 August 2019. Retrieved 12 August 2019.
leichtathletik.de
"DLV Bestenliste 2009 – Schüler M14"(PDF). www.leichtathletik.de | Das Leichtathletik-Portal (in German). 4 January 2010. Archived(PDF) from the original on 26 September 2020. Retrieved 20 August 2019.
"News". www.leichtathletik.de | Das Leichtathletik-Portal (in German). 19 March 2019. Archived from the original on 30 April 2019. Retrieved 30 April 2019.
"News". www.leichtathletik.de | Das Leichtathletik-Portal (in German). 16 February 2019. Archived from the original on 17 February 2019. Retrieved 23 August 2019.
"News". www.leichtathletik.de | Das Leichtathletik-Portal (in German). 1 March 2019. Archived from the original on 30 April 2019. Retrieved 30 April 2019.
"DLV Bestenliste 2009 – Schüler M14"(PDF). www.leichtathletik.de | Das Leichtathletik-Portal (in German). 4 January 2010. Archived(PDF) from the original on 26 September 2020. Retrieved 20 August 2019.
"Nikolas Klosterhalfen". leichtathletik-datenbank.de. Archived from the original on 12 August 2019. Retrieved 12 August 2019.
"News". www.leichtathletik.de | Das Leichtathletik-Portal (in German). 19 March 2019. Archived from the original on 30 April 2019. Retrieved 30 April 2019.
"News". www.leichtathletik.de | Das Leichtathletik-Portal (in German). 16 February 2019. Archived from the original on 17 February 2019. Retrieved 23 August 2019.
"News". www.leichtathletik.de | Das Leichtathletik-Portal (in German). 1 March 2019. Archived from the original on 30 April 2019. Retrieved 30 April 2019.