"Een goed passende schaats" [A well fitting skate]. Natuurijswijzer (Natural Ice Guide) (in Dutch). Archived from the original on 6 December 2014. Retrieved 27 November 2014.
"Een goed passende schaats" [A well fitting skate]. Natuurijswijzer (Natural Ice Guide) (in Dutch). Archived from the original on 6 December 2014. Retrieved 27 November 2014.