1. H. Cramér, Mathematical Methods of Statistics, Princeton Univ. Press, 1946, pp. 537–541.
2. S. Chapman andJ. Bartels, Geomagnetism, Oxford, Clarendon Press, 1951, p. 563.
3. H. Scheffé, The Analysis of Variance, John Wiley and Sons, New York, 1959, pp. 207–213.
4. L. Jánossy, Theory and Practice of the Evaluation of Measurements, Oxford, Clarendon Press, 1965, pp. 230–253.
5. See [1]H. Cramér, Mathematical Methods of Statistics, Princeton Univ. Press, 1946, p. 117.