1. Harrison, G. A. and Boyce, A. J. (1972) (EDS) The Structure of Human Populations. Oxford University Press, New York.
2. Irwin, J. O. (1949) A note on the subdivision of X2 into components. Biometrika 36, 130–134.
3. Kendall, M. G. (1943) The Advanced Theory of Statistics. Griffin, London.
4. Lancaster, H. O. (1949) The derivation and partition of x2 in certain discrete distributions. Biometrika 36, 117–129 (Correction: 37, 452 ).
5. Lancaster, H. O. (1949) The combination of probabilities arising from data in discrete distributions. Biometrika 36, 370–382 (Correction: 37, 452 ).