1. Collective risk results;Beekman;Transactions of the Society of Actuaries,1968
2. Two Stochastic Processes;Beekman,1974
3. A series for infinite time ruin probabilities;Beekman;Insurance: Mathematics and Economics,1985
4. A collective risk comparative study;Beekman;Insurance: Mathematics and Economics,1987
5. Actuarial Mathematics;Bowers,1983