2See W. Friedmann, Legal theory, Stevens & Sons, Ltd. (London), 1947, p. 18.p.59-60.
3登特列夫.《自然法：法律哲学导论》，李口章译，联经出版事业公司1984年版，页11—29.
4See Stephen M. Feldman, American Legal thoaghtfrom Premodemism to Postmodemism: an intellectual voyage, Oxford University(Oxford), 2000, pp. 11 - 2.
5See e.g. Freiherr vonder Heydte, "Natural Law Tendencies in Contemporary, German Jurisprudence", 1956, 1 Nat. L. Forum 115, at 116- 120. Cited from Julius Stone, Human Law and Human Justice, Stanford University Press(Stanford), 1965, p. 193.
6See James E. Herget, Contomporary German Legal Philosophy, University of Pennsylvania Press (Philadelphia), 1996, p. 1.p.4.
8See Dennis Lloyd, The Idea of Law, Penguin Books Ltd. (New York), 1981, p. 112.
9Hart, "Positivism and the Separation of Law and Morals"(1957 -58), 71 Harvard Law Rewev. , p.618.
10See Frederick Schauer, "Positivism as Pariah", ed in The Autonovty of Law : essays on legal positivism, by Robert P. George,Clarendon Press(Oxford), 1996, p.37.
