1. Limit theorems for renewal processes in the infinite mean case;Anderson,1985
2. A renewal theorem in the infinite mean case;Anderson;Ann. Probab.,1987
3. Probability and Measure;Billingsley,1995
4. On the limiting ratio of current age to total life for null recurrent renewal processes;Blanchet,2015
5. Some limit theorems for sums of independent random variables with infinite mathematical expectations;Dynkin;Sel. Transl. Math. Statist. Probab.,1961