- "History" (in Dutch). Vereniging De Friesche Elf Steden [Association of the Eleven Fries Cities]. Retrieved 2010-09-26.
* Women were first allowed to take part in the tour proper in 1985; before then they had to skate with the amateurs and no award was given.
** After shared wins in 1933 and 1940, when the front-runners decided not to compete but join hands to cross the line together, this practice was forbidden by the organisation. Jan van der Hoorn, Aad de Koning, Jeen Nauta, Maus Wijnhout and Anton Verhoeven however ignored this rule when they crossed the finish line in unison. They were not disqualified, but no winner was declared.
- "3,000 Skaters in 124-mile race". The Times. No. 48527. London. 31 January 1940. col B, p. 7.
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