Elhassan, A. M.; Babiker, A. M.; Ahmed, M. E.; El Hussein, A. M. Coinfections of Sudanese Dairy Cattle With Bovine Herpes Virus 1, Bovine Viral Diarrhea Virus, Bluetongue Virus and Bovine Herpes Virus 4 and Their Relation to Reproductive Disorders. J. Adv. Vet. Anim. Res 2017, 3, 332-337.