[1] R. Bellman, Letter to Harold W. Kuhn, dated 11 February, 1975, [Unpublished, copy in possession of the author.]
[2] G. A. Bliss, G. A. 1938, Normality and abnormality in the calculus of variations, Trans. Amer. Math. Soc., 43 (1938) 365–376.
[3] R. W. Cottle, William Karush and the KKT Theorem, Documenta Math., Extra Volume ISMP, 2012 255-265.
[4] W. Karush, Minima of Functions of Several Variables with Inequalities as Side Conditions, Department of Mathematics, University of Chicago, 1939.
[5] W. Karush, Letter to Harold W. Kuhn, dated 10 February, 1975, [Unpublished; copy in possession of the author.]
[6] W. Karush, The Crescent Dictionary of Mathematics, The Macmillan Company, New York, 1962.
[7] W. Karush, Webster’s New World Dictionary of Mathematics, MacMillan, New York, 1989.
[8] T. H. Kjeldson, A Contextualized Historical Analysis of the Kuhn–Tucker Theorem in Nonlinear Programming: The Impact of World War II, Historia Mathematica, 27 (2000) 331–361.
[9] H. W. Kuhn, Nonlinear programming: A historical view, SIAM–AMS Proceedings, 9 (1976) 1–26.
[10] H. W. Kuhn, Letter to William Karush, dated 4 February, 1975, [Unpublished; copy in possession of the author.]
[11] K. H. Parshall and D. E. Rowe, The Emergence of the American Mathematical Research Community, 1876–1900: J. J. Sylvester, Felix Klein, and E. H. Moore, History of Mathematics, Providence, Amer. Math. Soc., 8 1994.
[12] A. Takayama, A. Mathematical Economics, Hinsdale, IL: Dryden, 1974.