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2. On some expansions of stable distributions;Bergstrom;Arkiv für Matematik,1952
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4. Estimators of the parameters of the student distribution and other fat-tailed distributions;Blattberg;University of Chicago Center for Mathematical Studies in Business and Economics Report 7501,1975
5. Exchange rate risk and the bid-ask spread: A 7 country comparison;Boothe;University of Alberta Discussion Paper No. 85-5.,1985