3Karsten Hueffer. The natural host range shift and subsequent evolution of canine parvovirus resulted from virus-specific binding to the canine transfer in receptor[J]. Journal of Virology, 2003,2:1718-1726.
4Jensen, Rechard and Thursby, Marie. Proofs and Prototypes for Sale: The Licensing of University Inventions [ J]. The American Economic Review, 2001,91 ( 1 ).
