"Konsekvenser for luftfart"(PDF) (in Norwegian). Avinor. October 2012. p. 41. Archived(PDF) from the original on 1 November 2013. Retrieved 25 January 2012.
"Konsekvenser for luftfart"(PDF) (in Norwegian). Avinor. October 2012. p. 41. Archived(PDF) from the original on 1 November 2013. Retrieved 25 January 2012.