Zimmerman, A. D., A. L. Klein, R. E. Buterbaugh, C. L. Rinehart, and C. C. L. Chase. “Protection Against Bovine Herpesvirus Type 1 (BHV-1) Abortion Following Challenge 8 Months or Approximately 1 Year After Vaccination”. The Bovine Practitioner, vol. 47, no. 2, June 2013, pp. 73-83, doi:10.21423/bovine-vol47no2p73-83.