1. An introduction to multivariate statistical analysis;Anderson,1958
2. The vector representation of a sample;Bartlett;Proceedings of the Cambridge Philosophical Society,1934
3. Further aspects of the theory of multiple regression;Bartlett;Proceedings of the Cambridge Philosophical Society,1938
4. Study behaviour and performance in objective and essay formats;Biggs;Australian Journal of Education,1973
5. Statistical power analysis for the behavioral sciences;Cohen,1969