1. P. Andersen, O. Borgan, R. Gill and N. Keiding,Statistical Models Based on Counting Processes, Springer-Verlag: New York, 1992.
2. E. Arjas, ?The failure and hazard processes in multivariate reliability systems,?Mathematics of Operations Research vol. 6 pp. 551?562, 1981.
3. E. Arjas, Discussion to the paper of B. Bergman entitled ?On reliability and its applications,?Scandinavian Journal of Statistics vol. 12 pp. 28?29, 1985.
4. E. Arjas, ?Survival models and martingale dynamics (with discussions),?Scandinavian Journal of Statistics vol. 16 pp. 177?225, 1989.
5. E. Arjas and I. Norros, ?Life lengths and association: a dynamic approach,?Mathematics of Operations Research vol. 9 151?158, 1984.