@article{pacheco_2015, title={What Expands in an Expanding Universe?}, volume={87}, ISSN={0001-3765}, url={https://doi.org/10.1590/0001-3765201520140650}, DOI={10.1590/0001-3765201520140650}, number={4}, journal={Anais da Academia Brasileira de Ciências}, publisher={Academia Brasileira de Ciências}, author={PACHECO, JOSÉ A. DE FREITAS}, year={2015}, month={Oct}, pages={1915–1927} }