D. Yakir, A. Issar, J. Gat, E. Adar, P. Trimborn and J. Lipp, “13C and 18O of Wood from the Roman Siege Rampart in Masada (70–73 AD): Evidence for a Less Arid Climate for the Region,” Geochimica Cosmochimica Acta 58 (1994), pp. 3535–3539.