References/Notes/Attributions:
Source
R. N. Thompson, J. Esson and A. C. Duncan (1972) Major element chemical variation in the Eocene lavas of the Isle of Skye. J. Petrology, 13, 219–253.
References
J. Aitchison (1986) The Statistical Analysis of Compositional Data. Chapman and Hall, p.360.
Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.