Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KURIYAMA M.,"Ninhydrin reactive substances in marine algae-III.On the chemical structure of ""unknown A"" isolated from red algae",Nippon Suisan Gakkaishi,,,1961,27,,699-702,https://cir.nii.ac.jp/crid/1570291224304254208,