1. Mayfield, J.E., Good, P.J., VanOort, H.J., Campbell, A. R., and Reed, D.E., J Virol, 47, 259, 1983.
2. Wyler, R., Engels, M., and Schwyzer, M. in G.Wittman (ed). Herpesvirus Diseases of Cattle, Horses and Pigs. Kluwer Academic Publisher, Boston, 1989, pp. 1?72.
3. Roizman, B., Desrosiers, R.C., Fleckenstein, B., Lopez, C., Minson, A.C., and Studdert, M.J., Arch Virol, 123, 425, 1992.
4. Engels, M., Steck, F., and Wyler, R., Arch Virol, 67, 169, 1981.
5. Whetstone, C.A., Wheeler, J.G., and Reed, D.E., Am J Vet Res 47, 1789, 1986