Buller, R.M. and Palumbo, G.J. (1991). Poxvirus pathogenesis. Microbiol Rev., 55, 80-122.

Dales, S. and Pogo, B.G.T. (1981). “Biology of Poxviruses”. In: Kingsbury, D.W., zur Hausen, H. (eds). “Virology Monographs”, No. 18. Springer-Verlag, New York.

Esposito, J.J. and Nakano, J.H. (1991). Poxvirus infections in humans. In: Balows, A., Hausler, W.J., et al (eds). “Manual of Clinical Microbiology”, 5th edn. American Society for Microbiology, Washington D.C., pp 858-867.

Black, D.N., Hammond, J.M. and Kitching, R.P. (1986). Genomic relationship between capripoxviruses. Virus Research, 5, 277-292.

Gershon, P.D. and Black, D.N. (1988). A comparison of the genomes of capripoxvirus isolates of sheep, goats and cattle. Virology, 164, 341-349.

Fenner, F., Henderson, D.A., Arita, I., Jezek, Z. and Ladnyi, D. (1988). Smallpox and its eradication. World Health Organization, Geneva.

Fenner, F. and Nakano, J.H. (1988). “Poxviridae: The Poxviruses”. In: Lennette, E.H., Halonen, P., Murphy, F.A. (eds). “Laboratory Diagnosis of Infectious Diseases: Principles and Practice”, Vol. 2. “Viral, Rickettsial and Chlamydial Diseases”. Springer-Verlag, New York, pp 177-207.

Fenner, F., Wittek, R. and Dumbell, K.R. (eds). (1989). “The Orthopoxviruses”. Academic Press, New York.

Fenner, F. (1996). Poxviruses. In: Fields, B.N., Knipe, D.M. and Howley, P.M., (eds). “Virology”, 3^rd edn. Vol. 2., Lippincott-Raven Press, New York, pp 2673-2702.

Gassmann, U., Wyler, R. and Wittek, R. (1985). Analysis of parapoxvirus genomes. Arch.Virol., 83, 17-31.

Granados, R.R. (1981). Entomopoxvirus infections in insects. In: Davidson, I. (ed) “Pathogenesis of Invertebrate Microbial. Diseases”. Allenheld Osmu, Totowa New Jersey, pp 101-129

Mercer, A.A., Lyttle, D.J., Whelan, E.M., Fleming, S.B. and Sullivan, J.T. (1995). The establishment of a genetic map of orf virus reveals a pattern of genomic organization that is highly conserved among divergent poxviruses. Virology, 212, 698-704.

Meyer, H., Ropp, S.L. and Esposito, J.J. (1998) Poxvirus diagnostic protocols. In A. Warnes, J. Stephenson, (eds). “Methods in molecular biology: diagnostic virology protocols”. Humana Press, Totowa, New Jersey.

Meyer, H., Ropp, S.L. and Esposito, J.J. (1997) Gene for A-type inclusion body protein is useful for a polymerase chain reaction assay to differentiate orthopoxviruses. J. Virol. Methods, 64, 217-221.

Moyer, R.W. and Turner, P.C. (eds). (1990). Poxviruses. In: “Current Topics in Microbiology and Immunology”, Vol. 163. Springer-Verlag, New York.

Moss, B. (1996). Poxviridae: The viruses and their replication. In: Fields, B.N., Knipe, D.M. and Howley, P.M. (eds). “Virology”, 3rd edn. Vol 2. Raven Press, New York, pp 2637-2671.

Robinson, A.J. and Lyttle, D.J. (1992). Parapoxviruses: their biology and potential as recombinant vaccine vectors. In: Binns, M.M. and Smith, G.L. (eds). “Recombinant Poxviruses”. CRC Press, Boca Raton FL, pp 285-327.

Tripathy, D.N. and Reed, W.M. (1997). Pox. In: Calek, B.W., Barnes, H.J. et al (eds). “Diseases of Poultry”, 10th edn. Iowa State University Press, Ames Iowa, pp 643-659.

Tripathy, D.N., Hanson, L.E. and Crandell, R.A. (1981). “Poxviruses of veterinary importance: diagnosis of infections”. In: Kurstak, E. and Kurstak, C. (eds). “Comparative Diagnosis of Viral Diseases” Vol. 3. Academic Press, New York, pp 267-346.

Vanderplasschen, A., Hollinshead, M. and Smith, G.L. (1998). Intracellular and extracellular vaccinia virions enter cells by different mechanisms. J. Gen. Virol, 79, 877-887.