@article{barker_rodríguez_sinden_1994,  title={Attempted isolation of the gene encoding the 21 Kd Plasmodium berghei ookinete transmission blocking antigen from Plasmodium yoelli and Plasmodium vivax},  volume={89},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761994000600010},  DOI={10.1590/S0074-02761994000600010},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Barker, G. C. and Rodríguez, M. H. and Sinden, R. E.},  year={1994},  pages={37–41} }