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Nonlinear dependence in Finnish stock returns
Booth, G. Geoffrey, (1994)
On the Classification of Financial Ratios; A Factor and Transformation Analysis of Accrual, Cash Flow, and Market-Based Ratios
Salmi, Timo,
Some Empirical Tests of the Arbitrage Pricing Theory Using Transformation Analysis.
Yli-Olli, Paavo, (1992)