RomanIslam Center (DFG) - Stefan Heidemann, Sabine Panzram Heidemann, Stefan 2021 - Lecture2Go UHH - frei zugänglich
An Inscribed Ballista Stone from Apollonia-Arsūf, Israel, and Stone-throwing Siege Machines in the Medieval Near East Heidemann, Stefan Nicolle, David C. Tal, Oren 2021 - Forschungsinformationssystem der UHH