@article{vasquez_vargas junior_ribeiro_leão_justen_2009,  title={Experimental determination of the effective pressure coefficients for Brazilian limestones and sandstones},  volume={27},  ISSN={0102-261X},  url={https://doi.org/10.1590/S0102-261X2009000100004},  DOI={10.1590/S0102-261X2009000100004},  number={1},  journal={Revista Brasileira de Geofísica},  publisher={Sociedade Brasileira de Geofísica},  author={Vasquez, Guilherme Fernandes and Vargas Junior, Eurípedes do Amaral and Ribeiro, Cleide Jeane Bacelar and Leão, Marcos and Justen, Julio Cesar Ramos},  year={2009},  month={Jan},  pages={43–53} }