E. W. Comings, « English Engineering Units and Their Dimensions », Industrial & Engineering Chemistry, vol. 32, no 7, , p. 984–987 (DOI10.1021/ie50367a028)
Adrian Klinkenberg, « The American Engineering System of Units and Its Dimensional Constant gc », Industrial & Engineering Chemistry, vol. 61, no 4, , p. 53–59 (DOI10.1021/ie50712a010)