Higuchi and Lach, "Investigation of Complexes Formed in Solution by Caffeine. IV. Interactions Between Caffeine and Sulfathiazole, Sulfadiazine, p-Aminobenzoic Acid, Benzocaine, Phenobarbital, and Barbital,", 1954

Higuchi and Lach, "Investigation of Complexes Formed in Solution by Caffeine. IV. Interactions Between Caffeine and Sulfathiazole, Sulfadiazine, p-Aminobenzoic Acid, Benzocaine, Phenobarbital, and Barbital,", 1954, Box: 10, Folder: 188. Personal papers of Takeru Higuchi, PP 359. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/124612 Accessed February 16, 2026.