1. Probability and Measure;Billingsley,1979
2. A First Course in Asymptotic Theory of Statistics;Chandra,1999
3. Some elementary strong laws of large numbers: a review;Chandra,1998
4. On the application of the Borel–Cantelli lemma;Chung;Trans. Amer. Math. Soc.,1952
5. On Cantor's series with convergent ∑1/qn;Erdös;Ann. Univ. Sci. Budapest. Eotvos Sect. Math.,1959