Higuchi and Gensch, "Acylation through a Sulfonium Ion Intermediate. Coupled Conversion of a Carboxylic Acid to an Acid Anhydride during Oxidation of a Thioether to a Sulfoxide,", 1966

Higuchi and Gensch, "Acylation through a Sulfonium Ion Intermediate. Coupled Conversion of a Carboxylic Acid to an Acid Anhydride during Oxidation of a Thioether to a Sulfoxide,", 1966, Box: 10, Folder: 34. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124458 Accessed December 25, 2025.