6Knight, D.B. Identity and territory: geographical perspectives on nationalism and regionalism [ J ]. Annals of the Association of American Gographers, No. 72,1982 : 514531.
7Jakob de Haan, Clemens L · J · Siermann · Political Instability, Freedom, and Economic Growth : Some Further Evidence, Eco - nomic Development and Cultural Change, Vol ·44, No · 2, (Jan ·, 1996), p·340.
8Max Weber: Political Writings, ed By P. Lassman and R. Speirs , Cambridge University Press, 1994, p43.