1. Aalen, O.: Statistical inference for a family of counting processes. Ph.D. dissertation, Univ. of California, Berkeley. Reprinted by the Copenhagen University Institute of Mathematical Statistics (1975)
2. Aalen, O.: Nonparametric inference in connection with multiple decrement models. Scandinavian J. Statist. 3, 15?27 (1976)
3. Billingsley, P.: Convergence of Probability Measures. New York: Wiley 1968
4. Boel, R., Varaiya, P., Wong, E.: Martingales on jump processes I: Representation results. SIAM J. Control, 13, 999?1021 (1975a)
5. Boel, R., Varaiya, P., Wong, E.: Martingales on jump processes II: Applications. SIAM J. Control, 13, 1022?1061 (1975b)