Challenger, Frederick; Margaret Isabel Simpson (1948). “Studies on biological methylation. Part XII. A precursor of the dimethyl sulphide evolved by Polysiphonia fastigiata. Dimethyl-2-carboxyethylsulphonium hydroxide and its salts”. 《Journal of the Chemical Society》 3: 1591–1597. doi:10.1039/JR9480001591. PMID18101461.
Challenger, Frederick; Margaret Isabel Simpson (1948). “Studies on biological methylation. Part XII. A precursor of the dimethyl sulphide evolved by Polysiphonia fastigiata. Dimethyl-2-carboxyethylsulphonium hydroxide and its salts”. 《Journal of the Chemical Society》 3: 1591–1597. doi:10.1039/JR9480001591. PMID18101461.