Redoubt (English Wikipedia)

"Dictionary of Fortifications: Redoubt". Civil War Field Fortifications flair Website. September 2005. Archived from the original on 19 January 2010.
"Field Fortification: On The Trace Of Field Fortifications". Civil War Field Fortifications Website. March 2003. Archived from the original on 9 January 2010.

eh4-marenostrum.net (Global: low place; English: low place)

"Vendôme Tower" (PDF). Mare Nostrum. Archived from the original (PDF) on 31 May 2015. Retrieved 23 April 2015.

"Online Etymology Dictionary: redoubt". Etymonline.com. Retrieved 6 September 2012.

Debono, Charles. "Coastal Redoubts". Mellieha.com. Archived from the original on 23 September 2018. Retrieved 23 April 2015.

Spiteri, Stephen C. (10 April 2010). "18th Century Hospitaller Coastal Batteries". MilitaryArchitecture.com. Archived from the original on 8 November 2015. Retrieved 23 April 2015.
Spiteri, Stephen C. (May 2008). "Maltese 'siege' batteries of the blockade 1798–1800" (PDF). Arx – Online Journal of Military Architecture and Fortification (6): 30–46. Archived from the original (PDF) on 26 November 2016. Retrieved 23 April 2015.
Spiteri, Stephen C. "Naxxar and its fortifications". MilitaryArchitecture.com. Archived from the original on 16 January 2016. Retrieved 29 January 2016.

"Dictionary of Fortifications: Redoubt". Civil War Field Fortifications flair Website. September 2005. Archived from the original on 19 January 2010.
"Field Fortification: On The Trace Of Field Fortifications". Civil War Field Fortifications Website. March 2003. Archived from the original on 9 January 2010.
Debono, Charles. "Coastal Redoubts". Mellieha.com. Archived from the original on 23 September 2018. Retrieved 23 April 2015.
Spiteri, Stephen C. (10 April 2010). "18th Century Hospitaller Coastal Batteries". MilitaryArchitecture.com. Archived from the original on 8 November 2015. Retrieved 23 April 2015.
"Vendôme Tower" (PDF). Mare Nostrum. Archived from the original (PDF) on 31 May 2015. Retrieved 23 April 2015.
Spiteri, Stephen C. (May 2008). "Maltese 'siege' batteries of the blockade 1798–1800" (PDF). Arx – Online Journal of Military Architecture and Fortification (6): 30–46. Archived from the original (PDF) on 26 November 2016. Retrieved 23 April 2015.
Spiteri, Stephen C. "Naxxar and its fortifications". MilitaryArchitecture.com. Archived from the original on 16 January 2016. Retrieved 29 January 2016.