@article{donelson_1988,  title={A Summary of the molecular biology of antigenic variation in african trypanosomes},  volume={83},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761988000500004},  DOI={10.1590/S0074-02761988000500004},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Donelson, John E.},  year={1988},  month={Nov},  pages={244–248} }