«Wayback Machine». web.archive.org. 4. november 2013. Archived from the original on 4. november 2013. Besøkt 12. november 2019.CS1-vedlikehold: Uheldig URL (link)
«Wayback Machine»(PDF). web.archive.org. 22. august 2019. Archived from the original on 22. august 2019. Besøkt 12. november 2019.CS1-vedlikehold: Uheldig URL (link)