@article{vitral_gaspar_yoshida_1991,  title={Two competitive enzyme immunoassays for the detection of IgG class antibodies to hepatitis a antigen},  volume={24},  ISSN={0037-8682},  url={https://doi.org/10.1590/S0037-86821991000200003},  DOI={10.1590/S0037-86821991000200003},  number={2},  journal={Revista da Sociedade Brasileira de Medicina Tropical},  publisher={Sociedade Brasileira de Medicina Tropical - SBMT},  author={Vitral, Claudia Lamarca and Gaspar, Ana Maria Coimbra and Yoshida, Clara Fumiko Tachibana},  year={1991},  month={Apr},  pages={79–85} }