1. Characterization of the normal distribution among continuous symmetric spherical class;Ali;J. Roy. Statist. Soc. Ser. B,1980
2. Some Contributions to Characterization Theory;Alzaid,1983
3. On Ali's characterization of spherical normal distribution;Arnold;J. Roy. Statist. Soc. Ser. B,1982
4. The vector representation of a sample;Bartlett,1934
5. Multivariate experimental designs for exploring responses surfaces;Box;Ann. Math. Statist.,1957