Links

The Website is: https://firemissionbattery.com/

Contact: [email protected]

Norris, John (2003). Early Gunpowder Artillery: 1300–1600. Marlborough: The Crowood Press. p. 11. ISBN 1-86126-615-4.

Kelly, Jack (2004). "Gunpowder: Alchemy, Bombards, & Pyrotechnics: The History of the Explosive that Changed the World". Basic Books. .

Konungs skuggsjá

https://en.wikipedia.org/wiki/Konungs_skuggsj%C3%A1

Bottomley, Frank (1983). The Castle Explorer's Guide. Crown Publishers. ISBN 0-517-42172-0.