Reference
- L. Cesari, Variation, Multiplicity, and Semicontinuity, this Monthly, 65 (1958) 317–332.
References
- E. Beckenbach and R. Bellman, An Introduction to Inequalities, New Mathematical Library, Random House, New York, 1961.
- C. Huygens, Treatise on Light, translated by S. P. Thompson, Dover, New York, 1962.
Reference
- D. Pedoe, Circles, Pergamon, London, 1957.
Reference
- T. H. Hildebrandt, Introduction to the Theory of Integration, Academic Press, New York, London, 1963.