The principal pertinent works are: Duncan Kennedy, Form and Substance in Private-Law Adjudication, 89 Harv. L. Rev. 1685 (1976); Frank Easterbrook, Foreword: The Court and the Economic System, 98 Harv. L. Rev. 4 (1984); Pierre Schlag, "Rules and Standards," 33 UCLA L. Rev. 379 (1985); Mark Kelman, A Guide to Critical Legal Studies 15-63 (1987); Margaret Jane Radin, Reconsidering the Rule of Law, 69 B.U. L. Rev. 781 (1989); Frederick Schauer, Playing by the Rules: A Philosophical Examination of Rule-Based Decisionmaking in Law and in Life (1991); Kathleen Sullivan, Foreword: The Justices of Rules and Standards, 106 Harv. L. Rev. 22, 24 (1992).