References
- Maor , E. 1977 . Maths Teacher , 70 : 20
- Kazarinoff , N. D. 1961 . Analytic Inequalities , New York; Holt, Rinehart & Winston .
- Swokowski , E. W. 1981 . Fundamentals of Algebra and Trigonometry, , Fifth edition , Boston Massachusetts : Prindle Weber and Schmidt .
- Hardy , G. H. , Littlewood , J. E. and Polya , G. 1952 . Inequalities , Cambridge : Cambridge University Press .
- Losse , J. 1982 . Ultra Function Plot (Avant‐Garde Creations, P.O. Box 30160 Eugene, OR 97403)