@article{echer_gonzalez_vieira_dal lago_guarnieri_prestes_gonzalez_schuch_2003,  title={Interplanetary shock parameters during solar activity maximum (2000) and minimum (1995-1996)},  volume={33},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332003000100010},  DOI={10.1590/S0103-97332003000100010},  number={1},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Echer, E. and Gonzalez, W. D. and Vieira, L. E. A. and Dal Lago, A. and Guarnieri, F. L. and Prestes, A. and Gonzalez, A. L. C. and Schuch, N. J.},  year={2003},  month={Mar},  pages={115–122} }