@article{raviolo_barbosa_neumann_2009, title={Characteristics, distribution and diagenetic stages of chert in the La Silla Formation (Lower Ordovician), Argentine Precordillera}, volume={81}, ISSN={0001-3765}, url={https://doi.org/10.1590/S0001-37652009000400015}, DOI={10.1590/S0001-37652009000400015}, number={4}, journal={Anais da Academia Brasileira de Ciências}, publisher={Academia Brasileira de Ciências}, author={Raviolo, Mariana M. and Barbosa, José A. and Neumann, Virgínio H.}, year={2009}, month={Dec}, pages={781–792} }