@book{ BA44453866, author = "Higgott, Richard A. and Underhill, Geoffrey R. D. and Bieler, Andreas", title = "Non-state actors and authority in the global system", publisher = "Routledge", year = "2000", series = "Warwick studies in globalisation", number = "1", URL = "https://ci.nii.ac.jp/ncid/BA44453866" }