References
- Fieser , L. F. and Fieser , M. 1957 . Introduction to Organic Chemistry , Boston : D.C. Heath . Chapter 2
- Silverstein , R. M. , Bassler , G. C. and Morrill , T. C. 1981 . Spectrometric Identification of Organic Compounds. , Fourth edition , New York : John Wiley & Sons . Chapter 2, section 6
- Senior , J. K. 1951 . Am. J. Math. , 73 : 663 See, also, Hakimi, S. L., 1962,J. Soc. Indust. Appl. Math.,10, 496.
- Lie , C. L. 1977 . Elements of Discrete Mathematics , New York : McGraw‐Hill . Chapter 4