Baatz, Dietwulf. “Recent Finds of Ancient Artillery.” Britannia, 9 (1978): 1-17.
Bachrach, Bernard S. “Medieval Siege Warfare: A Reconnaissance.” The Journal of Military History, 58 #1 (January 1994): 119-133.
Bradbury, Jim. The Medieval Siege. Woodbridge, Suffolk: The Boydell Press, 1992.
Chevedden, Paul E. “Artillery in Late Antiquity: Prelude to the Middle Ages,” in The Medieval City under Siege, edited by Ivy A. Corfis and Michael Wolfe, pp. 131–176. Woodbridge, Suffolk: The Boydell Press, 1995.
Cuomo, Serafina. “The Sinews of War: Ancient Catapults.” Science, New Series, 303 #5659 (February 6, 2004): 771-772.
DeVries, Kelly. Medieval Military Technology. Ontario: Broadview Press, 1992.
DeVries, Kelly & Robert D. Smith. Medieval Weapons: An Illustrated History of their Impact. Santa Barbara, CA: ABC-CLIO, Inc, 2007.
Dufour, Guillaume. Mémoire sur l’artillerie des anciens et sur celle de Moyen Âge. Paris: Ab. Cherbuliez et Ce,1840).
Hacker, Barton C. “Greek Catapults and Catapult Technology: Science, Technology, and War in the Ancient World.” Technology and Culture, 9 #1 (January 1968): 34-50.
Huuri, Kalervo. “Zur Geschicte de mitterlalterlichen Geschützwesens aus orientalischen Quellen,” in Societas Orientalia Fennica, Studia Orientalia 9.3 (1941): pp. 50–220.
Johnson, Stephen. Late Roman Fortifications. Totowa, NJ: Barnes & Noble Books, 1983.
Köhler, G. Die Entwickelung des Kriegwesens und der Kriegfürung in der Ritterseit von Mitte des II. Jahrhundert bis du Hussitenkriegen, Vol. 3. Breslau: Verlag von Wilhelm Koebner, 1890.
Landels, J.G. Engineering in the Ancient World. Berkeley: University of California Press, 1978.
Marsden, E.W. Greek and Roman Artillery: Historical Development. Oxford: Clarendon Press, 1969.
Nicholson, Helen. Medieval Warfare: Theory and Practice of War in Europe, 300-1500. New York: Palgrave Macmillan, 2004.
Nossov, Konstantin. Ancient and Medieval Siege Weapons: A Fully Illustrated Guide to Siege Weapons and Tactics. Guilford, CT: The Lyons Press, 2005.
Reinschmidt, Kenneth F. “Catapults of Yore.” Science, New Series, 304 #5675 (May 28, 2004): 1247.
Rihill, Tracey. The Catapult: A History. Yardley, PA: Wesholme Publishing, LLC, 2007.
Rihill, Tracey. “On Artillery Towers and Catapult Sizes.” The Annual of the British School at Athens, 101 (2006): 379-383.
Rogers, Randall. Latin Siege Warfare in the Twelfth Century. Oxford: Oxford University Press, 1992.
Roland, Alex. “Science, Technology, and War.” Technology and Culture, 36 #2, Supplement: Snapshots of a Discipline: Selected Proceedings from the Conference on Critical Problems and Research Frontiers in the History of Technology, Madison, Wisconsin, October 30-November 3, 1991 (April 1995): S83-100.
Schneider, Rudolf. Die Artillerie des Mittelalters. Berlin: Weidmannsche Buchhandlung, 1910.
Tarver, W.T.S. “The Traction Trebuchet: A Reconstruction of an Early Medieval Siege Engine.” Technology and Culture, 36 #1 (January 1995): 136-167.
Thompson, E.A. “Early Germanic Warfare.” Past and Present, 14 (November 1958): 2-29.