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2. “The Elements of Stochastic Processes with Applications to the Natural Sciences.”;Bailey,1964
3. “Random and Restricted Walks; Theory and Applications.”;Barber,1970
4. “Elements of the Theory of Markov Processes and their Applications.”;Bharucha-Reid,1960
5. The analysis of non-Markovian stochastic processes by the inclusion of supplementary variables;Cox;Proc. Cambridge Philos. Soc.,1955