1Johnson C A, Emsbo P, Poole F G and Rye R O. Sulfur- and oxygen-isotopes in sediment-hosted stratiform barite deposits [J]. Geochimica et Cosmochimica Acta, 2009, 73:133-147.
2Holser W T and Kaplan I R. Isotope geochemistry of sedimentary sulfates [J]. Chemical Geology, 1966, 1:93-135.