Higuchi and Michaelis, "Mechanism and Kinetics of Ion Pair Extraction. Rate of Extraction of Dextromethorphanium Ion,", 1968, Box: 11, Folder: 7. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124641 Accessed December 21, 2024.