Higuchi et. al, "Rate of Anhydride Formation in Tartrate Buffer System, Nature of Reaction Product with Aniline,", 1965, Box: 11, Folder: 74. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124708 Accessed January 02, 2025.