@article{aiello_1997,  title={Brains and guts in human evolution: The Expensive Tissue Hypothesis},  volume={20},  ISSN={0100-8455},  url={https://doi.org/10.1590/S0100-84551997000100023},  DOI={10.1590/S0100-84551997000100023},  number={1},  journal={Brazilian Journal of Genetics},  publisher={Sociedade Brasileira de Genética},  author={Aiello, Leslie C.},  year={1997},  month={Mar},  pages={141–148} }