@article{souza_saa_2005,  title={Phase space solutions in scalar-tensor cosmological models},  volume={35},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332005000700004},  DOI={10.1590/S0103-97332005000700004},  number={4b},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Souza, José C. C. de and Saa, Alberto},  year={2005},  month={Dec},  pages={1041–1043} }