1. Transformation analysis of factorial data;Ahmavaara;Annales Academiae Scientiarum Fennicae Ser. B,1954
2. On the mathematical theory of transformation analysis;Ahmavaara;Publications of the Social Research Institute of Alcohol Studies No. 1,1963
3. Transformation analysis;Ahmavaara,1966
4. Transformation analysis of statistical variables, an introduction of group-theoretical ideas into multivariate analysis;Ahmavaara;Transactions of the Westermarck Society,1970
5. Empirical classification of financial ratios;Aho,1980