Higuchi et. al, "Acylation of Phenol by Cyclic and Acyclic Anhydrides in Anhydrous Acetic Acid,", 1975

Higuchi et. al, "Acylation of Phenol by Cyclic and Acyclic Anhydrides in Anhydrous Acetic Acid,", 1975, Box: 10, Folder: 33. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124457 Accessed December 25, 2025.