1. Andrews, D.F., Mallows, C.L.: Scale mixtures of normal distributions. J. Roy. Statist. Soc. Ser. B 36, 99?102 (1974)
2. Barndorff-Nielsen, O.: Exponentially decreasing log-size distributions. Research Report No. 20, Dept. Theor. Statist., Aaarhus Univ. (To appear in Proc. Royal Soc. London Ser. A. (1976))
3. Erdélyi, A. et al: Higher Transcendental Functions. Vol. II. New York: McGraw-Hill 1953
4. Feller, W.: An Introduction to Probability Theory and Its Applications. Vol. II. New York: Wiley 1966
5. Grosswald, E.: The Student t-distribution of any degree of freedom is infinitely divisible. Z. Wahrscheinlichkeitstheorie verw. Gebiete 36, 103?109 (1976)