Higuchi and Kuramoto, "Study of Possible Complex Formation Between Macromolecules and Certain Pharmaceuticals, I. Polyvinylpyrrolidone with Sulfathiazole, Procaine Hydrochloride, Sodium Salicylate, Benzyl Penicillin, Chloramphenicol, Mandelic Acid, Caffeine, Theophylline, and Cortisone,", 1954, Box: 11, Folder: 120. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124754 Accessed December 21, 2024.