1. V. V. Petrov, Sums of Independent Random Variables (Springer-Verlag, Berlin, 1975), p. 182.
2. V. Korolev and I. Shevtsova, Scand. Actuarial J., (2010), http://www.informaworld.com/10.1080/03461238.2010.485370 .
3. C.-G. Esseen, Skand. Aktuarietidskr 39(4), 160–170 (1956).
4. I. G. Shevtsova, Dokl. Akad. Nauk 430(4), 466–469 (2010).
5. I. G. Shevtsova, Theory of Probability and Its Applications 55(2), 271–304 (2010).