ヴァレ・システム
Nicolas Édouard Delabarre-Duparcq: Elements of Military Art and History (1863)
Paul L Dawson BSc Hons FINS: Systeme An XI and the re-design of the French Artillery
Kenneth N. Jassie: Napoleon's Artillery Legacies: France, 1815-1914 University of Wisconsin-Madison, 1988
Matthew C. Switlik: US Field Gun Carriages—Their History and Evolution, (originally published in the Artilleryman Magazine, V.15 No.3 (revised, 1-7-2001)