1. W. Feller, An Introduction to Probability Theory and its Applications, John Wiley, New York (1971).
2. D. R. Cox and V. L. Smith, Renewal Theory, Methuen, London (1962).
3. V. D. Shpak, “Characterization of a symmetric terminating renewal process,” Kibern. Sist. Analiz, No. 4, 632–634 (1991).
4. V. S. Korolyuk and A. F. Turbin, Semi-Markovian Processes and Their Applications [in Russian], Naukova Dumka, Kiev (1976).
5. M. Becker and A. M. Kshirsagar, “Terminating Markov renewal processes,” Commun. Statist. Theor. Meth., 11(3), 325–342 (1982).