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Cullen 2010. Cullen, Kevin (9. marts 2010). "Brewing a Viking Era Ale". The Distant Mirror. Milwaukee, Wisconsin: Discovery World. Arkiveret fra originalen 27. september 2015. Hentet 16. november 2016. Blog author is an archaeologist at Discovery World in Milwaukee, Wisconsin: with references .{{cite web}}: CS1-vedligeholdelse: postscript (link)
Wolfe 2016. Wolfe, Wes (10. februar 2016). "Brewing Beer for Art". The Free Press. Kinston, North Carolina. Arkiveret fra originalen 22. februar 2016. Hentet 15. november 2016.
Wolfe 2016. Wolfe, Wes (10. februar 2016). "Brewing Beer for Art". The Free Press. Kinston, North Carolina. Arkiveret fra originalen 22. februar 2016. Hentet 15. november 2016.
Mark 2011. Mark, Joshua J. (2. marts 2011). "Beer in the Ancient World". Ancient EU. Horsham, England: Ancient History Encyclopedia Limited. Arkiveret fra originalen 12. september 2016. Hentet 16. november 2016.
Cullen 2010. Cullen, Kevin (9. marts 2010). "Brewing a Viking Era Ale". The Distant Mirror. Milwaukee, Wisconsin: Discovery World. Arkiveret fra originalen 27. september 2015. Hentet 16. november 2016. Blog author is an archaeologist at Discovery World in Milwaukee, Wisconsin: with references .{{cite web}}: CS1-vedligeholdelse: postscript (link)