@article{freitas_rezende_2008,  title={Protection between strains of Papaya ringspot virus: type w in zucchini squash involves competition for viral replication sites},  volume={65},  ISSN={0103-9016},  url={https://doi.org/10.1590/S0103-90162008000200012},  DOI={10.1590/S0103-90162008000200012},  number={2},  journal={Scientia Agricola},  publisher={Escola Superior de Agricultura "Luiz de Queiroz"},  author={Freitas, Débora Maria Sansini and Rezende, Jorge Alberto Marques},  year={2008},  month={Mar},  pages={183–189} }