Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Angelina M. Stoyanova,Spectrophotometric determination of trace iron by using its catalytic effect on the N-phenylanthranilic acid-potassium periodate reaction,Analytical Sciences,09106340,Tokyo : Japan Society for Analytical Chemistry,2008,24,5,595-599,https://cir.nii.ac.jp/crid/1520009408071304704,