1. M.L. Nibert, L.A. Schiff, in Fields Virology, 4th edn, ed. by D.M. Knipe, P.M. Howley (Lippincot Williams & Wilkins Inc., Philadelphia, 2001), p. 1679
2. P. Roy, in Fields Virology, 4th edn, ed. by D.M. Knipe, P.M. Howley (Lippincot Williams & Wilkins Inc., Philadelphia, 2001), p. 1835
3. M.K. Estes, in Fields Virology, 4th edn, ed. by D.M. Knipe, P.M. Howley (Lippincot Williams & Wilkins Inc., Philadelphia, 2001), p. 1747
4. K.L. Tyler, in Fields Virology, 4th edn, ed. by D.M. Knipe, P.M. Howley (Lippincot Williams & Wilkins Inc., Philadelphia, 2001), p. 1725
5. A.J. Shatkin, J.D. Sipe, P. Loh, J. Virol. 2, 986–991 (1968)