Higuchi et. al, "Reversible Formation and Hydrolysis of Phthaloyl and Succinyl Monophosphates in Aqueous Solution,", 1967, Box: 11, Folder: 88. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124722 Accessed January 17, 2025.