Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) BOWERS GN. Jr,4-Nitrophenyl phosphate-characterization of high purity material for measuring alkaline phosphatase activity in human serum,Clin Chem,,,1981,27,,135-143,https://cir.nii.ac.jp/crid/1571135649689374080,