@article{mello_vasconcelos_1969,  title={Classification of varieties of pasteurella pestis strains isolated in the interior of the state of Pernambuco-Brazil},  volume={3},  ISSN={0037-8682},  url={https://doi.org/10.1590/S0037-86821969000500007},  DOI={10.1590/S0037-86821969000500007},  number={5},  journal={Revista da Sociedade Brasileira de Medicina Tropical},  publisher={Sociedade Brasileira de Medicina Tropical - SBMT},  author={Mello, Dalva A. and Vasconcelos, Laura M.},  year={1969},  pages={269–271} }