1. On the distribution of values of sums of random variables;Chung;Mem. Am. Math. Soc.,1951
2. Stochastic Processes;Doob,1953
3. On the stochastic matrices associated with certain queueing processes;Foster;Ann. Math. Stat.,1953
4. The existence of stationary measures for certain Markov processes;Harris,1956
5. First passage and recurrence distributions;Harris;Trans. Am. Math. Soc.,1952