Alvarez, R., Lwamba, H. M., Kapczynski, D. R., Njenga, M. K., & Seal, B. S. (2003). Nucleotide and Predicted Amino Acid Sequence-Based Analysis of the Avian Metapneumovirus Type C Cell Attachment Glycoprotein Gene: Phylogenetic Analysis and Molecular Epidemiology of U.S. Pneumoviruses. American Society for Microbiology.

Alvarez, Rene, Humphrey M. Lwamba, Darrell R. Kapczynski, M. Kariuki Njenga, i Bruce S. Seal. Nucleotide and Predicted Amino Acid Sequence-Based Analysis of the Avian Metapneumovirus Type C Cell Attachment Glycoprotein Gene: Phylogenetic Analysis and Molecular Epidemiology of U.S. Pneumoviruses. American Society for Microbiology, 2003.

Alvarez, Rene, et al. Nucleotide and Predicted Amino Acid Sequence-Based Analysis of the Avian Metapneumovirus Type C Cell Attachment Glycoprotein Gene: Phylogenetic Analysis and Molecular Epidemiology of U.S. Pneumoviruses. American Society for Microbiology, 2003.