[1] L.Fuller, The Morality of Law, Yale University Press, 1969, p.143.
[2] Mark Greenburg, How Facts Make Law, 10 Legal Theory 157 (2004).
[3] H.L.A.Hart, Jhering’s Heaven of Concepts and Modern Analytical Jurisprudence, in Eaasys in Jurisprudence and philosophy, Oxford University Press, 1983, pp.269-270.