1. N. I. Akhiezer, The Classical Moments Problem and Certain Problems of Analysis Connected with It [in Russian], Gosudarstvennoe Izdatel'stvo Fizikomatematicheskoi Literatury, Moscow (1961).
2. W. Feller, Introduction to Probability Theory and Its Applications, Vol. 2, Wiley (1966).
3. J. V. Linnik and I. V. Ostrovskii, Decomposition of Random Variables and Vectors, Am. Math. Soc. (1977).
4. O. Thorin, ?On the infinite divisibility of the Pareto distribution,? Scand. Actuar. J.,11, 31?40 (1977).