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Okeke, Malachy Ifeanyi, Øivind Nilssen, Ugo Moens, Morten Tryland, and Terje Traavik. In Vitro Host Range, Multiplication and Virion Forms of Recombinant Viruses Obtained From Co-infection in Vitro With a Vaccinia-vectored Influenza Vaccine and a Naturally Occurring Cowpox Virus Isolate. BioMed Central, 2009.

Okeke, Malachy Ifeanyi, et al. In Vitro Host Range, Multiplication and Virion Forms of Recombinant Viruses Obtained From Co-infection in Vitro With a Vaccinia-vectored Influenza Vaccine and a Naturally Occurring Cowpox Virus Isolate. BioMed Central, 2009.