Nicholson, D. W. Pashley and M. J. Whelan (1965/1977) Electron microscopy of thin crystals (Butterworths/Krieger, London/Malabar FL) ISBN 0-88275-376-2
區域著陸,但即使在其上鎮建設工作提高到一個後衛的優勢,陡峭的山坡。這些因素給了它千百年來一個巨大的軍事意義。 Dennis, pp. 7–8 Krieger, p. 8 Abulafia, David. The Great Sea: A Human History of the Mediterranean