Coastal defence and fortification (English Wikipedia)

Brown, D. (2006). "Palmerston and Anglo—French Relations, 1846—1865". Diplomacy & Statecraft. 17 (4): 675–692. doi:10.1080/09592290600942918. S2CID 154025726.

globalsecurity.org

"Gallery 2: The Ming Period (1368–1644)". Hong Kong Museum of Coastal Defence. Archived from the original on 2013-09-05. Retrieved 2009-11-29.
"Gallery 3: The Qing Period (1644–1911)". Hong Kong Museum of Coastal Defence. Archived from the original on 2012-04-09. Retrieved 2009-11-29.
"History". Hong Kong Museum of Coastal Defence. Archived from the original on 2009-05-26. Retrieved 2009-11-29.

Debono, Charles. "Coastal Towers". Mellieha.com. Archived from the original on 10 May 2015. Retrieved 23 April 2015.

"Ingeniería Militar durante la Colonia". Memoria Chilena (in Spanish). Biblioteca Nacional de Chile. Retrieved September 30, 2014.
"Lugares estratégicos", Memoria chilena (in Spanish), Biblioteca Nacional de Chile, retrieved 30 December 2015

Spiteri, Stephen C. (10 April 2010). "18th Century Hospitaller Coastal Batteries". MilitaryArchitecture.com. Archived from the original on 20 June 2016. Retrieved 23 April 2015.

"Coastal Defense". United States National Park Service. Archived from the original on June 30, 2007. Retrieved 2009-11-29.

Baigent, Captain AJ (1959). "Coast Artillery Defences". Royal New Zealand Artillery Association. Archived from the original on 2009-10-17. Retrieved 2009-11-29.

Brown, D. (2006). "Palmerston and Anglo—French Relations, 1846—1865". Diplomacy & Statecraft. 17 (4): 675–692. doi:10.1080/09592290600942918. S2CID 154025726.

"Archived copy" (PDF). Archived from the original (PDF) on 2006-07-23. Retrieved 2019-08-29.{{cite web}}: CS1 maint: archived copy as title (link)

Robbert Kock The Dutch in Chili Archived 2016-03-03 at the Wayback Machine at coloniavoyage.com
"Gallery 2: The Ming Period (1368–1644)". Hong Kong Museum of Coastal Defence. Archived from the original on 2013-09-05. Retrieved 2009-11-29.
"Gallery 3: The Qing Period (1644–1911)". Hong Kong Museum of Coastal Defence. Archived from the original on 2012-04-09. Retrieved 2009-11-29.
"History". Hong Kong Museum of Coastal Defence. Archived from the original on 2009-05-26. Retrieved 2009-11-29.
Debono, Charles. "Coastal Towers". Mellieha.com. Archived from the original on 10 May 2015. Retrieved 23 April 2015.
Spiteri, Stephen C. (10 April 2010). "18th Century Hospitaller Coastal Batteries". MilitaryArchitecture.com. Archived from the original on 20 June 2016. Retrieved 23 April 2015.
Baigent, Captain AJ (1959). "Coast Artillery Defences". Royal New Zealand Artillery Association. Archived from the original on 2009-10-17. Retrieved 2009-11-29.
"Coastal Defense". United States National Park Service. Archived from the original on June 30, 2007. Retrieved 2009-11-29.
"Archived copy" (PDF). Archived from the original (PDF) on 2006-07-23. Retrieved 2019-08-29.{{cite web}}: CS1 maint: archived copy as title (link)

Brown, William Baker (1911). "Coast Defence" . In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 6 (11th ed.). Cambridge University Press. pp. 599–602.