Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) HASEGAWA Kazuo,Determination of Sulfonic Acid Sodium Salt and Sulfonamide in Bright Nickel Bath by Phosphoric Acid-Potassium Permanganate Decomposition Method,Journal of the Metal Finishing Society of Japan,0026-0614,The Surface Finishing Society of Japan,1961,12,2,59-62,https://cir.nii.ac.jp/crid/1390282679092033280,https://doi.org/10.4139/sfj1950.12.59