@inproceedings{liu_lewellen_2007, 
  title={Distribution and differentiation of resistance-breaking isolates of Beet necrotic yellow vein virus in the United States}, 
  DOI={10.5274/assbt.2007.54}, 
  publisher={ASSBT}, 
  author={Liu and Lewellen}, 
  year={2007}, 
  month={Feb}
  }