Garda, G., P. Beljavskis, C. Juliani, and A. Boyce. “Sulfur Stable Isotope Signatures of the Morro Da Pedra Preta Formation, Serra Do Itaberaba Group, São Paulo State, Brazil”. Geochimica Brasiliensis, vol. 16, no. 1, May 2017, p. 79, https://geobrasiliensis.org.br/geobrasiliensis/article/view/500.