Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) "井上, 隆夫",Determination of Caffeine-Natrium Benzoate and Theobromine-Natrium Salicylate by Paper Chromatography,The annual Report of the Hoshi College of Pharmacy,0441-2559,星薬科大学,1961,,10,17-19,https://cir.nii.ac.jp/crid/1050282812579596928,