1. Methods of adjustment for estimating the attributable risk in case-control studies: a review;Benichou;Stat. Med.,1991
2. Caldow, G.L., Buxton, D., Spence, J.A., Holisz, J., 1996. Diagnoses of bovine abortion in Scotland. In: Proceedings of the 19th World Buiatrics Congress, Edinburgh, July 8–12, 1996, pp. 191–194.
3. Cavirani, S., Foni, E., Ferrari, A., Donofrio, G., Cabassi, C.S., Scatozza, F., 1998. Infectious causes of bovine abortion in northern Italy dairy herds. In: Proceedings of the 20th World Buiatrics Congress, Sydney, July 6–10, 1998, p. 1116.
4. Serological investigation on the frequency of chlamydial infection in some herds of cattle;Cerri;Proc. Congr. S.I.S. Vet.,1990
5. A serological survey on chlamydiosis in cattle of Apulia and Basilicata regions;Corsalini;Proc. Congr. S.I.S. Vet.,1989