Tham khảo Heron thành Byzantium

  1. ↑ Sullivan, Dennis F. biên tập (2000). Siegecraft: Two Tenth-Century Instructional Manuals by "Heron of Byzantium" (PDF). Dumbarton Oaks Studies XXXVI. Washington, DC: Dumbarton Oaks Research Library and Collection. tr. 1, 3–4. ISBN 0-88402-270-6.
  2. ↑ McGeer, Dennis (1995). “Byzantine Siege Warfare in Theory and Practice”. Trong Corfis, Ivy A.; Wolfe, Michael (biên tập). The Medieval City Under Siege. Woodbridge, Suffolk: Boydell Press. tr. 124–125. ISBN 0-85115-561-8.
  3. ↑ Sullivan (2000), pp. 1–2.