"Archived copy"(PDF). www.dtu.dk. Archived from the original(PDF) on 19 July 2011. Retrieved 22 May 2022.{{cite web}}: CS1 maint: archived copy as title (link)
"Archived copy"(PDF). www.dtu.dk. Archived from the original(PDF) on 19 July 2011. Retrieved 22 May 2022.{{cite web}}: CS1 maint: archived copy as title (link)