Steensen, Robert Steen. Vore Panserskibe [Our Armoured Vessels]. Marinehistorisk Selskab, Copenhagen, Denmark: 1968. Pages 178-195. Steensen was a former Commander in the Royal Danish Navy. An English translation by Søren Nørby may be found at "The Armoured Ram Stærkodder". Archived from the original on 2007-10-20. Retrieved 2008-11-29.
Steensen, Robert Steen. Vore Panserskibe [Our Armoured Vessels]. Marinehistorisk Selskab, Copenhagen, Denmark: 1968. Pages 178-195. Steensen was a former Commander in the Royal Danish Navy. An English translation by Søren Nørby may be found at "The Armoured Ram Stærkodder". Archived from the original on 2007-10-20. Retrieved 2008-11-29.