Higuchi et. al, "Possible Mechanism of Uptake for Several Compounds in Ionized Form through Human Erythrocyte Membrane,", 1984, Box: 11, Folder: 58. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124692 Accessed January 17, 2025.