Higuchi et. al, "Characterization of Racemic -Hydroxy- and -Hydroxysuccinanilic Acids", 1968

Higuchi et. al, "Characterization of Racemic α-Hydroxy- and β-Hydroxysuccinanilic Acids", 1968, Box: 10, Folder: 62. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124486 Accessed December 25, 2025.